269 F.R.D. 298 | S.D.N.Y. | 2010
OPINION AND ORDER
1. INTRODUCTION
Plaintiffs Westchester Putnam Counties Heavy & Highway Laborers Local 60 Benefit Funds (“Local 60”), Alan Hyman, Phil Carey, Steve Geist, and Peter Schicker bring this putative securities class action based on allegations that Sadia, S.A. (“Sadia” or “the Company”) and several of its current and former officers
[A]ll persons and entities who purchased or otherwise acquired [Sadia] American Depositary Receipts (“ADRs”) from April 30, 2008 to September 26, 2008 [ (the “Class Period”) ], inclusive, and who were damaged thereby (the “Class”).3
Plaintiffs also seek an order appointing them as Class representatives and approving plaintiffs’ selection of Saxena White P.A. (“Saxena White”) and Barroway Topaz Kessler Metlzer & Cheek, LLP (“Barroway Topaz”) as Class counsel. For the reasons set forth below, plaintiffs’ motion is granted.
While plaintiffs’ motion presents a number of issues commonly considered in a class certification motion'—each of which is discussed below—the key question presented in this motion is whether plaintiffs must prove
In the typical case, where a plaintiff can demonstrate that a stock price decline followed a corrective disclosure, a court can infer that the information contained in that disclosure was material on the day the stock price declined and throughout the class period. The facts presented here, however, present an atypical scenario. In most securities cases, the wrongdoing and the financial impact of that wrongdoing—most often an undisclosed loss or overstatement—are the same throughout the class period. For example, on January 1, a company publicly states that its earnings for the quarter were one hundred million dollars. In fact, the company overstated its earnings by twenty million dollars. On February 1, the company discloses the truth that it had overstated its earnings and its stock price drops by one dollar. Although such evidence is not dispositive, it can be reasonably inferred that the overstatement is material.
By contrast, the financial impact of the wrongdoing here may vary considerably throughout the class period. While Sadia’s currency hedging contracts were unwound at a loss of $410 million in September 2008, they could have resulted in a net profit for Sadia had they been unwound earlier in the Class Period. Moreover, the amount of profit and loss was not constant. Instead, it varied day-to-day from a peak potential profit of seventy million dollars to the ultimate actual loss of $410 million.
Despite the fluctuations in the financial impact of the wrongdoing, plaintiffs argue that Sadia’s alleged misstatements and omissions were material throughout the class period, regardless of whether the currency hedging contracts could have been unwound for a profit. Plaintiffs’ proof on this question consists of the testimony of their Class representatives, their evidence that the price of Sadia’s ADRs dropped substantially following Sadia’s corrective disclosure, and their expert’s opinion that more than half of the overall price decline can be attributed to what he describes as “reputational losses” as opposed to direct losses on the currency hedging contracts.
Sadia, however, misunderstands a plaintiffs burden in proving materiality. Materiality is not determined by price impact alone. Rather, materiality depends on an assessment of all the relevant circumstances in a particular case. It requires an analysis of how information would be viewed by a reasonable investor and is influenced by considerations of fairness, probability, and common sense.
II. BACKGROUND
Sadia is a major Brazilian corporation whose primary business is the production and distribution of refrigerated and frozen food products to retailers throughout Latin America, the Middle East, Asia, and Europe.
Like other major exporting companies, Sadia engages in currency hedging to mitigate lost profits when foreign currency paid to it on future sales contracts declines against the value of its native currency before the transactions have been completed.
In or around 2004, Sadia implemented a Hedging or Investment Policy in connection with its hedging activities.
On May 30, 2008, Sadia entered into the first of twenty-two currency hedging contracts.
Plaintiffs contend that Sadia’s currency hedging activity was, in reality, a “high risk bet” that carried the Company to the brink of financial ruin when the Brazilian real (“BRL”) depreciated in value against the United States dollar (“USD”).
III. APPLICABLE LAW
A. Class Certification
1. Requirements Under Rule 23(a)
Rule 23 of the Federal Rules of Civil Procedure governs class certification. “ ‘Rule 23 is given liberal rather than restrictive construction, and courts are to adopt a standard of flexibility.’ ”
The numerosity requirement mandates that the class be “so numerous that joinder of all members is impracticable.”
Commonality requires a showing that common issues of fact or law affect all class members.
“Typicality ‘requires that the claims of the class representatives be typical of those of the class, and is satisfied when each class member’s claim arises from the same course of events [] and each class member makes similar legal arguments to prove the
Adequacy demands that “the representative parties will fairly and adequately protect the interests of the class.”
Finally, the courts have added an “implied requirement of ascertainability” to the express requirements of Rule 23(a).
2. Rule 23(b)
In addition to showing that the proposed class satisfies the four prerequisites of Rule 23(a), plaintiffs must show that the class is “maintainable” under Rule 23(b). A class satisfies this requirement if it fits into one of
Under Rule 23(b)(3), certification is appropriate where “questions of law or fact common to the members of the class predominate over any questions affecting only individual members,” and the court finds that class litigation “is superior to other available methods for the fair and efficient adjudication of the controversy.”
encompasses those eases in which a class action would achieve economies of time, effort, and expense, and promote uniformity of decision as to persons similarly situated, without sacrificing procedural fairness or bringing about other undesirable results.50
Under Rule 23(b)(3), a court must also determine whether a class action is “superior to other available methods for fairly and efficiently adjudicating the controversy.”
3. Rule 23(g)
“[A] court that certifies a class must appoint class counsel.”
4. Standard of Review
Plaintiffs bear the burden of demonstrating—by a preponderance of the evidence—that the proposed class meets the requirements for class certification.
5. Expert Testimony
In In re Visa Check/MasterMoney Antitrust Litigation, the Second Circuit held that “a district court may not weigh conflicting expert evidence or engage in ‘statistical dueling’ of experts.”
B. Securities Fraud
To state a claim for securities fraud, a plaintiff must show “both transaction causation (also known as reliance) and loss causation.”
1. Transaction Causation: Fraud on the Market Presumption
In Basic v. Levinson, the Supreme Court determined that an investor may invoke a rebuttable presumption of reliance in cases of misrepresentations.
Defendants can rebut such a presumption by demonstrating that “no price impact” resulted from the misrepresentations.
A “definitive assessment” that the Rule 23(b)(3) predominance requirement is met
2. Transaction Causation: Affiliated Ute Presumption
The Supreme Court has also held that a presumption of reliance may apply in cases in which plaintiffs have alleged that defendants failed to disclose information. In Affiliated Ute Citizens of Utah v. United States, the Court held that where a plaintiffs fraud claims are based on omissions, transaction causation may be satisfied as long as the plaintiff shows that defendants had an obligation to disclose the information and the information withheld is material.
3. Materiality
Demonstrating materiality under the fraud on the market and Affiliated Ute presumptions presents essentially the same inquiry. “ ‘[T]o fulfill the materiality requirement there must be a substantial likelihood that the disclosure of the omitted fact would have been viewed by the reasonable investor as having significantly altered the total mix of information made available.’ ”
Material facts include those “which affect the probable future of the company and those which may affect the desire of investors to buy, sell, or hold the company’s securities.” They include any fact “which in reasonable and objective contemplation might affect the value of the corporation’s stock or securities.”81
“An omitted fact may be immaterial if the information is trivial or is so basic that any investor could be expected to know it.”
4. Loss Causation
“[A] misstatement or omission is the ‘proximate cause’ of an investment loss if the risk that caused the loss was within the zone of risk concealed by the misrepresentations and omissions alleged by a disappointed investor.”
To demonstrate loss causation, a plaintiff must show “that the misstatement or omission concealed something from the market that, when disclosed, negatively affected the value of the security.”
IY. DISCUSSION
A. Rule 23(a) Requirements
1. Numerosity and Commonality
Sadia does not dispute that plaintiffs have demonstrated numerosity and commonality. Indeed, I find that plaintiffs have met these requirements by a preponderance of the evidence. With regard to numerosity, Sadia’s ADRs were actively traded on the NYSE, an open, well-developed and efficient market. Although plaintiffs have not ascertained the precise number of potential Class members, “they believe that there are thousands of potential Class members dispersed throughout the United States.”
Plaintiffs also have established the commonality requirement. The Complaint details a course of conduct whereby Sadia made material misrepresentations and omission to the public regarding Sadia’s exposure under its currency hedging contracts and that such exposure violated its internal hedging policy. Common questions of law and fact include whether (1) statements disseminated to the investing public and Sadia’s shareholders during the Class Period misrepresented and/or omitted to disclose material facts about the business, finances, financial condition, and future prospects of Sadia; (2) the market price of Sadia’s ADRs during the Class Period was artificially inflated due to defendants’ material misrepresentations and omissions and failure to correct those material misrepresentations and omissions; (3) defendants participated in and pursued a common course of conduct; (4) defendants’ acts violated the federal securities laws; and (5) the Class has sustained damages. Accordingly, plaintiffs have demonstrated commonality by a preponderance of the evidence.
2. Adequacy and Typicality
Plaintiffs have also satisfied the typicality and adequacy of representation requirements. The claims of the proposed Class representatives arise from the same event or course of misconduct as other Class members and are based on the same legal theory. In addition, there are no conflicts of interests between the proposed Class representatives and other putative Class members, and no unique defenses apply only to the proposed Class representatives. Finally, the proposed Class representatives have actively litigated this case for two years, and through their counsel, have engaged in motion practice and discovery.
Sadia contests this conclusion with regard to Hyman and Local 60 on the grounds that they lack familiarity with the claims and
3. Ascertainability
I am further convinced that the Class is ascertainable using objective criteria. The Class includes all purchasers of Sadia ADRs within a certain time period. Plaintiffs note that the putative Class members can be readily identified from Sadia’s books and records, as well as the records maintained by the applicable transfer agents.
4. Rule 23(g)
I find plaintiffs’ counsel to be “qualified, experienced and able to conduct the litigation.”
B. Rule 23(b)
1. Predominance
Sadia principally challenges plaintiffs’ class certification motion on the ground that plaintiffs cannot satisfy the predominance requirement.
a. Transaction Causation
(i) Plaintiffs’ Burden
For purposes of transaction causation, Sadia does not dispute that the market for its ADRs was efficient or that the alleged mis
To establish materiality, plaintiffs offer two pieces of evidence. First, plaintiffs proffer the expert report of Marc Vellrath.
Vellrath’s event study identified a “statistically significant ‘unpredieted’ ” decline in the price of Sadia’s ADRs of $5.62 on September 26, 2008.
Second, each class representative testified that his primary allegation of fraud is based on Sadia’s failure to disclose the amount of risk that Sadia undertook as part of its currency hedging practices and that doing so violated its internal hedging policies.
Plaintiffs additionally argue—as they must—that there was artificial inflation in the price of Sadia’s ADRs throughout the Class Period.
Sadia’s position conflicts with well-established law. In In re Salomon Analyst Metromedia Litigation, the Second Circuit reviewed a district court’s decision to certify a class over defendants’ objection that plaintiffs could not demonstrate the materiality of the alleged misstatements and omissions. Defendants argued “that the district court erred by not placing the burden on plaintiffs to prove that the alleged misrepresentations ‘moved the market,’ i.e., had a measurable effect on the stock price.”
The Second Circuit then reaffirmed its decision in Litton Industries, Inc. v. Lehman Brothers Kuhn Loeb Inc., noting that
“To saddle a plaintiff with proving the generally indeterminable fact of what would have happened but for the omission [or the misrepresentations that skewed the market value of stock] would reduce the protection against fraud afforded by Section 10(b). The reliance presumption ... reallocates the risks of mistaken adjudications, resolving questions of doubt in favor of the investors that section 10(b) seeks to protect.” Thus, plaintiffs do not bear the burden of showing an impact on price.128
To demonstrate materiality at the class certification stage, plaintiffs need not submit evidence that misstatements and omissions artificially inflated the price of Sadia’s ADRs at the time they were made or throughout the class period. Such a requirement would unfairly and unnecessarily heighten plaintiffs’
(ii) Sadia’s Burden
The burden then shifts to Sadia to demonstrate by a preponderance of the evidence that Sadia’s misstatements and omissions had no price impact. Relying on opinions expressed by its expert, Rene Stulz,
Stulz explained that for most of the period between May 30, 2008—the date on which Sadia entered into the first of these twenty-two contracts—and September 5, 2008, the BRL was actually increasing in value as compared to the USD.
However, in mid-to-late August 2008, the BRL began to weaken and dropped dramatically as compared to the USD. It was only as of September 5, 2008 that Sadia was in a position to suffer losses in connection with its hedges had they been unwound. Stulz opined that had Sadia disclosed that it had entered into these speculative currency hedging contracts at a time when Sadia would have received a net profit or broken-even— i.e., prior to September 5—Sadia’s ADRs would not have declined in value.
Sadia’s argument fails for lack of evidentiary support. It is undisputed that Sadia has shown that had some currency hedging contracts been unwound prior to September 5,
Moreover, in the only case uncovered by this Court that addressed materiality where the alleged wrongdoing resulted in an undisclosed benefit to the company, the court found the concealed information material. In SEC v. Stanard, then-district judge Gerard Lynch found, following a bench trial, that a company’s understatement of its net income was material even though the defendant “point[ed] to a number of facts suggesting that the impact of these inaccurate statements on investors was limited” and that “the market exhibited little reaction” to the company’s corrective disclosure.
Common sense, the testimony of the Class Representatives, and other court decisions,
Plaintiffs have presented evidence supporting the conclusion that Sadia’s misstatements and omissions were material and that they have satisfied the elements of the fraud on the market and Affiliated Ute presumptions. Sadia has failed to present sufficient evidence to rebut these presumptions—i.e., by proving by a preponderance of the evidence that there would have been no impact on price as a result of the failure to disclose information. I therefore conclude that plaintiffs may invoke these presumptions for purposes of demonstrating transaction causation on a class-wide basis.
b. Loss Causation
For purposes of demonstrating loss causation, plaintiffs again rely on Vellrath’s multifactor model event study which demonstrated a “statistically significant ‘unpredieted’ ” decline in the price of Sadia’s ADRs of $5.62 on September 26, 2008, immediately following Sadia’s disclosure that (1) it had mischaracterized its exposure under its currency hedging contracts; (2) it had failed to reveal that it had entered into currency hedging contracts in violation of its internal hedging policy; and (3) that it had suffered a loss of approximately $410 million as a result. Similar to the arguments presented with regard to transaction causation, Sadia first claims that to establish loss causation on a class-wide basis “plaintiffs must offer evidence to show that [] a misstatement or omission artificially inflated the value of Sadia ADRs during the class period____”
Sadia next attacks Vellrath’s event study methodology. First, Stulz opined that Veilrath ignored Sadia’s announcement during a September 26, 2008 conference call with analysts that Sadia had also suffered losses in its offshore assets of “‘approximately BRL100
Second, Stulz opined that Vellrath disregarded “the apparent understanding of analysts [on the September 26 conference call] that [Sadia’s] dollar debt was unhedged [] which [along with Sadia’s losses in its offshore assets] would have driven its ADR price further down below the dollar-for-dollar impact of the $410 million transaction loss for reasons entirely independent of the alleged fraud.”
Finally, Sadia asserts that Vellrath “completely ignores that Sadia’s disclosure was made during one of the most troubled periods in the history of modern capital markets.”
For the third time in as many months, the Court finds itself presented with the defense: “don’t blame me, blame the financial crisis.” For the same reasons I rejected this argument in prior eases,
As Sadia notes, because plaintiffs have not alleged that any part of the September 25 Disclosure had leaked into the market prior to that date, any purchasers who sold their Sadia ADRs prior to the market close on September 25 cannot demonstrate loss causation.
c. Damages
While plaintiffs have not yet offered a formula for calculating damages, plaintiffs claim that Vellrath set out a methodology that shows “a class member’s damages can be easily calculated.”
an analyst starts with the ‘clean’ price following the (full) disclosure of the wrongdoing and works backwards through the Class Period, determining the series of prices that would have generated the same daily returns as the actual price line (excluding days when the return was affected by the fraud or disclosure of the fraud).163
By baekcasting, Vellrath determined that there was a difference between the actual price for Sadia’s ADRs and their estimated true price on each day of the Class Period.
Vellrath then took this analysis one step further. Recognizing that Sadia’s net profit or loss from the currency hedging contracts varied throughout the Class Period,
Stulz challenged Vellrath’s opinion that the value of the wrongdoing would have remained constant throughout the Class Period
According to Stulz, Vellrath failed to account for the fact that Large Loss Costs and the market’s reaction to them would likely vary with the size of Sadia’s actual losses. For example, Stulz posited that when Sadia disclosed its $410 million loss, market participants grew concerned about the impact of the transaction loss on Sadia’s cost of debt, leverage, and ability to finance planned capital expenditures.
In response, Vellrath did not argue with Stulz’s opinion that Large Loss Costs comprise a portion of the loss. Vellrath explained that he included these costs as part of his calculation of the wrongdoing element and reputational losses and that they may be backcast as a constant.
I agree. Undoubtedly each article supports Vellrath’s opinion that losses can result from wrongdoing alone and can be measured following a corrective disclosure—supporting his methodology for purposes of transaction and loss causation.
For example, Vellrath quoted a paper by Professor Ingo Walter, which states that “ ‘[rjeputation risk is usually the consequence of management processes rather than discrete events ____’”
I am not convinced that Vellrath has sufficiently supported his methodology that a wrongdoing value can be backcast as a constant throughout the Class Period where the value of the actual loss varies. An investor that perceives its investment as a risk may sell its stock in response to learning that management is failing to abide by its risk management policies, regardless of whether the company’s risk taking resulted in a profit. A creditor or lender, on the other hand, may be more concerned about the company’s
2. Superiority
Defendants do not challenge superiority. I also independently conclude that a class action is superior to other available methods for the fair and efficient adjudication of this case. The case involves thousands of potential claimants who are asserting claims based on predominantly common issues. Claimants likely have no interest in pursuing their own claims, which may be prohibitively small. Adjudicating individual claims would also be a significant waste of judicial resources. In addition, this litigation has been pending since 2008. Class counsel and Class representatives have already spent a significant amount of time litigating this ease. Having already decided a motion to dismiss, this Court is familiar with the claims in this case, further making it desirable to continue this litigation here. Finally, managing this litigation as a class action will not pose any substantial difficulties for the Court.
V. CONCLUSION
For the foregoing reasons, plaintiffs’ motion for class certification is granted, except that purchasers who sold shares prior to the close of the market on September 25, 2008 are excluded. The Clerk of the Court is directed to close this motion (Document No. 47). A conference is scheduled for August 16, 2010 at 4:30 p.m.
SO ORDERED.
. The Amended Consolidated Complaint ("ACC” or "Complaint") names the following current and former officers of Sadia as defendants: its chairman, Luiz Fernando Furlan; its chief executive officer, Gilberto Tomazoni; its chief financial officer, Welson Teixeira, Jr.; its former chief financial officer, Adriano Lima Ferreira; its former president and chairman, Walter Fontana Filho; and its former vice chairman, Eduardo Fontana d’Avila (collectively, the “Individual Defendants”). Because Individual Defendants have not yet been served, plaintiffs move for class certification only as to Sadia. See Plaintiffs’ Memorandum of Law in Support of Motion for Class Certification (“PI. Mem.”) at 1 n. 1.
. See In re Sadia Sec. Litig., 643 F.Supp.2d 521 (S.D.N.Y.2009).
. Pl. Mem. at 1.
. See, e.g., SEC v. Penthouse Int’l Inc., 390 F.Supp.2d 344, 354 (S.D.N.Y.2005) (holding that the SEC had sufficiently pled materiality of an overstatement where the market’s response to the company's corrective disclosure was a substantial drop in the price of the company’s stock the following day).
. See generally Report of Marc Vellrath, Plaintiffs’ expert ("Vellrath Report”).
. See Basic v. Levinson, 485 U.S. 224, 231-32, 108 S.Ct. 978, 99 L.Ed.2d 194 (1988); In re Salomon Analyst Metromedia Litig., 544 F.3d 474, 482-83 (2d Cir.2008); Ganino v. Citizens Utils., Co., 228 F.3d 154, 162 (2d Cir.2000); Litton Indus., Inc. v. Lehman Bros. Kuhn Loeb Inc., 967 F.2d 742, 748 (2d Cir.1992).
. See ACC ¶ 2.
. See id. ¶ 16.
. See id. ¶ 87.
. See id. ¶ 28.
. See id. ¶ 30.
. See id. ¶ 27.
. See id.
. See id. ¶ 46.
. Id. ¶ 50. Accord id. ¶ 46.
. See Expert Report of Rene M. Stulz, Sadia’s expert, ("Stulz Report") ¶ 62; ACC ¶ 31. Although plaintiffs do not allege that Sadia entered into the first of these speculative currency hedging contracts on May 30, 2008, plaintiffs do not appear to dispute this fact. See, e.g., Surrebuttal [sic] Expert Report of Marc Vellrath (“Vellrath Reply”) ¶ 9 (noting, without dispute or qualification, that the twenty-two contracts at issue are those identified by Stulz).
. See Stulz Report ¶ 62; ACC ¶ 31.
. See Exs. 5A & 5B to Stulz Report (listing the trade dates and last maturity dates for each of the twenty-two contracts). For example, the May 30, 2008 contract was set to mature on June 30,2009. See Ex. A to Stulz Report.
. See Exs. 5A & 5B to Stulz Report.
. ACC ¶ 28.
. See id. ¶¶ 31-33.
. See id. ¶ 58.
. See Vellrath Report ¶ 51. Plaintiffs assert that Sadia’s ADR price plunged $5.77. See ACC ¶ 60. Plaintiffs do not provide an explanation for this discrepancy.
. See ACC ¶ 59.
. See id. V 60.
. See id. ¶ 66.
. Marisol A. v. Giuliani, 126 F.3d 372, 378 (2d Cir.1997) (quoting Sharif ex rel. Salahuddin v. New York State Educ. Dep't, 127 F.R.D. 84, 87 (S.D.N.Y.1989)).
. See Teamsters Local 445 Freight Div. Pension Fund v. Bombardier Inc., 546 F.3d 196, 201-02 (2d Cir.2008).
. Fed.R.Civ.P. 23(a)(1).
. See Central States Se. & Sw. Areas Health & Welfare Fund v. Merck-Medco Managed Care, L.L.C., 504 F.3d 229, 244-45 (2d Cir.2007).
. In re Vivendi Universal, S.A. Sec. Litig., 242 F.R.D. 76, 84 (S.D.N.Y.2007).
. See Consolidated Rail Corp. v. Town of Hyde Park, 47 F.3d 473, 483 (2d Cir.1995) (citing 1 Newberg On Class Actions § 3.05 (2d ed.1985)).
. See Fed.R.Civ.P. 23(a)(2).
. Trief v. Dun & Bradstreet Corp., 144 F.R.D. 193, 198 (S.D.N.Y.1992) (citing Port Auth. Police Benevolent Ass'n v. Port Auth., 698 F.2d 150, 153-54 (2d Cir.1983)).
. Civic Ass'n of the Deaf v. Giuliani, 915 F.Supp. 622, 633 (S.D.N.Y.1996). Accord Daniels v. City of New York, 198 F.R.D. 409, 417 (S.D.N.Y.2001) (citing Baby Neal for & by Kanter v. Casey, 43 F.3d 48, 56 (3d Cir.1994)); 7A Charles Alan Wright, Arthur R. Miller, & Mary Kay Kane, Federal Practice and Procedure § 1764 (3d ed. 2008) (“To the extent that 'co-extensive' suggests that the representatives’ claims must be substantially identical to those of the absent class members, it is too demanding a standard.”).
. Central States, 504 F.3d at 245 (quoting Robinson v. Metro-N. Commuter R.R. Co., 267 F.3d 147, 155 (2d Cir.2001)).
. Marisol A., 126 F.3d at 377.
. Newman v. RCN Telecom Servs., Inc., 238 F.R.D. 57, 64 (S.D.N.Y.2006). Accord Doe v. Chao, 306 F.3d 170, 183 (4th Cir.2002) (finding an absence of typicality where the "named claimants had not suffered 'injuries] similar to the injuries suffered by the other class members' ” (quoting McClain v. South Carolina Nat'l Bank, 105 F.3d 898, 903 (4th Cir.1997))).
. Oshana v. Coca-Cola Co., 472 F.3d 506, 514 (7th Cir.2006).
. Fed.R.Civ.P. 23(a)(4).
. Baffa v. Donaldson, Lufkin & Jenrette Secs. Corp., 222 F.3d 52, 60 (2d Cir.2000) (citing In re Drexel Burnham Lambert Group, Inc., 960 F.2d 285, 291 (2d Cir. 1992)).
. Id. at 61 (quoting Maywalt v. Parker & Parsley Petroleum Co., 67 F.3d 1072, 1077-78 (2d Cir. 1995)). Accord In re Flag Telecom Holdings, Ltd. Sec. Litig., 574 F.3d 29, 42 (2d Cir.2009).
. Baffa, 222 F.3d at 61 (citing Surowitz v. Hilton Hotels Corp., 383 U.S. 363, 370-74, 86 S.Ct. 845, 15 L.Ed.2d 807 (1966)). Accord Noble v. 93 Univ. Place Corp., 224 F.R.D. 330, 344 (S.D.N.Y. 2004) (holding that inflexible application of the adequacy requirement "runs counter to a principal objective of the class action mechanism-to facilitate recovery for those least able to pursue an individual action”).
. In re WorldCom, Inc. Sec. Litig., 219 F.R.D. 267, 286 (S.D.N.Y.2003) (quotation marks omitted).
. In re IPO Sec. Litig., 471 F.3d 24, 30 (2d Cir.2006).
. 7A Wright, Miller, & Kane, supra, § 1760. Accord In re Fosamax Prods. Liab. Litig., 248 F.R.D. 389, 395 (S.D.N.Y.2008) (quoting Rios v. Marshall, 100 F.R.D. 395, 403 (S.D.N.Y. 1983)).
. In re Fosamax, 248 F.R.D. at 395 (quoting In re Methyl Tertiary Butyl Ether ("MTBE’’) Prods. Liab. Litig., 209 F.R.D. 323, 337 (S.D.N.Y.2002)). Accord id. at 396 ("The Court also must be able to determine the class’ membership “ 'without having to answer numerous fact-intensive inquiries.' ” " (quoting Daniels, 198 F.R.D. at 414)).
. Fed.R.Civ.P. 23(b)(3).
. Brown v. Kelly, 609 F.3d 467, 483 (2d Cir. 2010) (quoting Cordes & Co. Fin. Servs., Inc. v. A.G. Edwards & Sons, Inc., 502 F.3d 91, 107-08 (2d Cir.2007)) (alteration and ellipsis in original). Accord In re Nassau County Strip Search Cases, 461 F.3d 219, 225 (2d Cir.2006) (‘‘[Predominance inquiry tests whether proposed classes are sufficiently cohesive to warrant adjudication by representation.”) (quotation marks omitted).
. Brown, 609 F.3d at 483 (quotations marks omitted).
. Fed.R.Civ.P. 23(b)(3).
. In re Nassau County, 461 F.3d at 230 (quoting Fed.R.Civ.P. 23(b)(3)).
. Fed.R.Civ.P. 23(g)(1).
. Fed.R.Civ.P. 23(g)(1)(A).
. Fed.R. Civ. P. 23(g)(1)(B).
. See Teamsters, 546 F.3d at 202.
. Id. (quoting In re IPO, 471 F.3d at 42).
. In re IPO, 471 F.3d at 41.
. Id.
. 280 F.3d 124, 135 (2d Cir.2001) (quoting Caridad v. Metro-North Commuter R.R., 191 F.3d 283, 292-93 (2d Cir.1999)).
. Id.
. In re IPO, 471 F.3d at 41.
. ATSI Commc'ns, Inc. v. Shaar Fund, Ltd., 493 F.3d 87, 106 (2d Cir.2007).
. Id. (quoting Lentell v. Merrill Lynch & Co., Inc., 396 F.3d 161 (2d Cir.2005)). Accord In re Omnicom Group, Inc. Sec. Litig., 597 F.3d 501, 509 (2d Cir.2010).
. ATSI, 493 F.3d at 106-07 (citing Dura Pharm., Inc. v. Broudo, 544 U.S. 336, 346, 125 S.Ct. 1627, 161 L.Ed.2d 577 (2005); Lentell, 396 F.3d at 172). Accord Emergent Capital Inv. Mgmt. v. Stonepath Group, Inc., 343 F.3d 189, 197 (2d Cir.2003).
. 485 U.S. at 247, 108 S.Ct. 978.
. Id. at 227, 108 S.Ct. 978.
. Id. at 247, 108 S.Ct. 978. Accord Hevesi v. Citigroup Inc., 366 F.3d 70, 77 (2d Cir.2004).
. In re Salomon Analyst, 544 F.3d at 483 (emphasis added).
. Basic, 485 U.S. at 248-49, 108 S.Ct. 978.
. Id.
. See id. at 248, 108 S.Ct. 978.
. In re Salomon Analyst, 544 F.3d at 485 (citations omitted).
. Id.
. Id. (quoting In re IPO, 471 F.3d at 41).
. See 406 U.S. 128, 154, 92 S.Ct. 1456, 31 L.Ed.2d 741(1972).
. See duPont v. Brady, 828 F.2d 75, 78 (2d Cir.1987).
. Id. at 76.
. Id. at 78 (quoting Rochez Bros. v. Rhoades, 491 F.2d 402, 410 (3d Cir.1974)). But see Ganino, 228 F.3d at 162 ("[I]t is not necessary to assert that the investor would have acted differently if an accurate disclosure was made.”).
. In re Salomon Analyst, 544 F.3d at 482 (quoting Basic, 485 U.S. at 231-32, 108 S.Ct. 978) (quotation marks omitted). Cf. Affiliated Ute, 406 U.S. at 153-54, 92 S.Ct. 1456 (explaining that facts are material if "a reasonable investor might have considered them important in the making of [a] decision").
. SEC v. Mayhew, 121 F.3d 44, 52 (2d Cir.1997) (quoting SEC v. Texas Gulf Sulphur Co., 401 F.2d 833, 849 (2d Cir.1968) (enbanc)).
. Id. (citing Basic, 485 U.S. at 231, 108 S.Ct. 978 and Levitin v. PaineWebber, Inc., 159 F.3d 698, 702 (2d Cir.1998)).
. Lentell, 396 F.3d at 173 (emphasis in original). Accord In re Omnicom, 597 F.3d at 513 (noting that the Second Circuit in Lentell adopted the "zone of risk” test).
. In re Omnicom, 597 F.3d at 513 (quoting Chemical Bank v. Arthur Andersen & Co., 726 F.2d 930, 943 (2d Cir.1984)).
. First Nationwide Bank v. Gelt Funding Corp., 27 F.3d 763, 769 (2d Cir.1994) (quoting Hecht v. Commerce Clearing House, Inc., 897 F.2d 21, 23-24 (2d Cir.1990)) (citations omitted). Accord ATSI, 493 F.3d at 107 ("[T]he plaintiffs complaint must plead that the loss was foreseeable and caused by the materialization of the risk concealed by the fraudulent statement.”) (citing Lentell, 396 F.3d at 173).
. Lentell, 396 F.3d at 173. Accord In re Omnicom, 597 F.3d at 510; ATSI, 493 F.3d at 107.
. Dura, 544 U.S. at 343, 125 S.Ct. 1627.
. Pl. Mem. at 7.
. See ACC ¶ 87.
. See Consolidated Rail Corp., 47 F.3d at 483.
. See Defendant Sadia's Memorandum of Law in Opposition to Plaintiffs' Motion for Class Certification ("Def. Opp.") at 20. Sadia also asserts that Hyman, Carey, and Schicker are subject to unique defenses because they purchased Sadia ADRs prior to September 5, 2008. As explained below, Sadia contends that transaction and loss causation cannot be demonstrated class-wide pri- or to this date. Because I reject this argument, see infra Parts IV.B.l.a & b, Sadia's position that Hyman, Carey, and Schicker are subject to unique defenses on this ground is moot.
. Def. Opp. at 21 (quoting Greenspan v. Brassier, 78 F.R.D. 130, 131 (S.D.N.Y.1978)).
. See Plaintiffs' Reply Memorandum in Further Support of the Motion for Class Certification at 8-10 & n. 9 (and citations to the record therein); 7/9/10 Hearing Transcript ("Hr’g Tr.”) at 52:25-57:23; Wagner v. Banick Gold Corp., 251 F.R.D. 112, 118 (S.D.N.Y.2008) ("It is sufficient if the class representatives are aware of the basic facts underlying the lawsuit and ... not ... likely to abdicate his [sic ] obligations to fellow class members.”) (alterations in original) (quotation marks omitted).
. See Pl. Mem. at 12.
. Baffa, 222 F.3d at 60 (citing In re Drexel, 960 F.2d at 291).
. See Firm Resume of Saxena White, Ex. H to Declaration of Christopher S. Jones, counsel for plaintiffs ("Jones Decl.”); Firm Resume of Barroway Topaz, Ex. I to Jones Decl. The Jones Declaration was filed January 5, 2009 (Docket No. 9) and incorporated by reference by plaintiffs for purposes of their class certification motion. See Pl. Mem. at 10 n. 7.
. See Def. Opp. at 6-20.
. See id. at 10 n. 14.
. The standards for materiality for purposes of the fraud on the market and Affiliated Ute presumptions substantially overlap. Sadia does not suggest that if this Court finds that the misstatements were material the omissions would not be material or vice versa. As a result, I will consider materiality for purposes of both presumptions concurrently.
. See In re Salomon Analyst, 544 F.3d at 482 (quoting Basic, 485 U.S. at 231-32, 108 S.Ct. 978) (quotation marks omitted).
. See Basic, 485 U.S. at 248, 108 S.Ct. 978.
. See id.
. Vellrath is an economist and financial analyst, holding M.S. and Ph.D degrees in economics from Carnegie Mellon University, an MBA degree from the University of Washington, and a BA degree from the University of Pennsylvania. Vellrath is presently the Chairman and Chief Executive Officer of Finance Scholars Group, a consulting firm with offices in California, New York, Texas, and Illinois. Prior to organizing the Finance Scholars group in July 2006, Vellrath held a series of positions in economics and finance. See Vellrath Report ¶¶ 1-3.
. Id. 11 41. See General Elec. Co. v. Jackson, 595 F.Supp.2d 8, 23-24 (D.D.C.2009) (stating that an event study is an acceptable method of determining the effect of an event on stock price).
. Vellrath Report ¶ 42.
. See id.
. See id.
. See id,
. Id. ¶ 51.
. Id.
. See id. ¶¶ 9, 31.
. See In re Merck & Co., Inc. Sec. Litig., 432 F.3d 261, 274 (3d Cir.2005) (explaining that
. See Vellrath Report ¶ 58; see also id. ¶ 62.
. See id. ¶ 60.
. See id.
. 60.95% = 640,000,000 h- 1,050,000,000. See id. ¶ 62 n. 69.
. $3.42 = $5.62 x 60.96%. See id. ¶ 62 n. 70.
. Without explanation, Vellrath reached $2.19 by subtracting $3.42 from $5.67, as opposed to $5.62 (which would yield a remainder of $2.20). See id. ¶ 63 n. 71. It is unclear whether Vellrath's use of $5.61 is a typo or intentional. Nevertheless, the outcome is the same regardless of whether the remainder is $2.19 or $2.20.
. See id. ¶ 62.
. See Geist Deposition, Ex. 9 to Declaration of John J. Gross in Support of Plaintiffs' Reply Memorandum in Further Support of the Motion for Class Certification ("Gross Decl.”), at 11:18— 22 (“Sadia ... basically gambled with shareholder money in attempting to, what they claim, hedge against currency fluctuations; actually gambled far in excess of what was needed to ensure against that and lost.”); Carey Deposition, Ex. 10 to Gross Decl., at 106:22-108:5 (explaining that he believed Sadia’s fraud to be its failure to disclose "the true exposure of what Sadia was doing ... that they were ... speculating on the currency exchange rates”); id. at 113:7-12; Schicker Deposition, Ex. 11 to Gross Decl., at 77:11-15 ("[T]he stock collapsed once we knew, the public knew about the hedging or the speculation, the side business the CFO was involved in this company to boost profit. And once that came out, that's when the stock collapsed."); id. at 100:24-102:21; see also Berardo Deposition, Local 60's representative, Ex. 12 to Gross Deck, at 81:20-82:2; Hyman Deposition, Ex. 13 to Gross Deck, at 123:10-18.
. Compare Levitin, 159 F.3d at 702 (holding that a brokerage firm's failure to inform customer that firm could earn money from collateral posted by customer in short-sale transactions was not material because a reasonable investor would know that collateral securing a short-sale transaction could produce income) and Newman v. L.P. Rothschild, Unterberg, Towbin, 651 F.Supp. 160, 163 (S.D.N.Y.1986) ("|T]hat a market decline can precipitate a margin call” is a fact "so basic that any investor could be expected to know it.”) (quotation marks omitted) with SEC v. Stanard, No. 06 Civ. 7736, 2009 WL 196023, at *23-*25 (S.D.N.Y. Jan. 27, 2009) (finding that understating net income and shifting genuine
. See Hr’g Tr. at 16:2-12.
. Vellrath’s initial report included a methodology to establish that the price of Sadia's ADRs was artificially inflated throughout the Class Period, not just on the day prior to the September 26 price drop. This methodology was offered in connection with calculating damages and is discussed below. See Vellrath Report ¶ 52 ("For purposes of determining the damages suffered by any individual class member ... [o]ne [ ] must identify (i) the amount of artificial inflation in Sadia’s ADR price on the date when the class member purchased his or her ADRs and (ii) for class members who sold before the end of the Class Period, the amount of artificial inflation in Sadia’s ADR price on the date when he or she sold his or her ADRs.”) (emphasis added).
. In re Salomon Analyst, 544 F.3d at 482.
. Id.
. Id. (citing Basic, 485 U.S. at 245, 108 S.Ct. 978) (emphasis added).
. Id. at 483 (citing Basic, 485 U.S. at 245-46 & n. 24, 108 S.Ct. 978) (emphasis added).
. Id. (quoting Litton Indus., 967 F.2d at 748) (alteration in original) (quotation marks and alteration omitted) (emphasis added). The Second Circuit in In re Salomon Analyst ultimately found that the district court did not abuse its discretion when ruling that plaintiffs had established materiality for purposes of the fraud on the market presumption. However, the Circuit remanded the action to the district court to permit defendants the opportunity to rebut the presumption— an opportunity the district court had not provided initially. See id. at 486. Although the district court did not describe precisely the evidence that plaintiffs submitted to the court to demonstrate materiality, it does not appear that plaintiffs relied on expert testimony. See In re Salomon Analyst Metromedia Litig., 236 F.R.D. 208, 223
. In re Salomon Analyst, 544 F.3d at 482 (" 'Requiring a plaintiff to show a speculative state of facts, i.e., how he would have acted if material information had been disclosed, or if the misrepresentation had not been made, would place an unnecessarily unrealistic evidentiary burden on the Rule 10b-5 plaintiff who has traded on an impersonal market.’ ") (quoting Basic, 485 U.S. at 245, 108 S.Ct. 978).
. Stulz earned a Ph.D in Economics from the Massachusetts Institute of Technology ("MIT”). Stulz currently holds the Everett D. Reese Chair in Money and Banking at the Ohio State University, is the Director of the Dice Center for Research in Financial Economics at the Ohio State University and is a Research Associate of the National Bureau of Economic Research in Cambridge, Massachusetts. See Stulz Report ¶ 1.
. See id. ¶¶ 36-53.
. Id. ¶ 38.
. See id. ¶ 59; see also Hr'g Tr. at 29:1-35:12. Stulz also opined that (1) Sadia’s allegedly speculative hedging is common among companies like Sadia and, therefore, no reasonable investor would consider the information material, see Stulz Report ¶¶ 16-25, and (2) at the time Sadia made alleged misstatements and omissions there was a substantially low probability that Sadia would suffer the losses it announced in the September 25 Disclosure, see id. ¶¶ 26-35. Although they may eventually be credited by a jury, neither of these opinions undermine the results of Vellrath’s event study or the Court’s conclusion that plaintiffs have satisfied their burden of demonstrating materiality.
. See Def. Opp. at 8-10; Hr’g Tr. at 42:11-22 (THE COURT: "So you would not oppose the certification of a class that was as narrow as September 5th on? ... MR. SIEGFRIED [Sadia's Counsel]: I think, your Honor, honestly, unless I could convince you that post September
. See Stulz Report ¶ 59 (citing Jeffrey L. Callen, Joshua Livnat, and Dan Segal, "Accounting Restatements: Are They Always Bad News for Investors?” The Journal of Investing, 57, 66 (2006) (concluding that "[t]he market seems not to penalize firms that engage in income-increasing restatements through changes in accounting methods, although the evidence reported in Exhibit 5 [to the article] for these firms indicates potential opportunistic behavior by managers [i.e., fraud]. Apparently, the negative effects of this opportunistic behavior are offset by upward revisions in future cashflow expectations since weaknesses in the accounting system is not an issue here.”) (emphasis added)).
. Id.
. Cf. In re TOUSA, Inc., 422 B.R. 783, 826 (Bankr.S.D.Fla.2009) (discrediting Stulz’s criticisms because they "are almost entirely theoretical and there is no evidence that they actually undermine the applicability and reliability of [the opposing expert’s] calculations”).
. 2009 WL 196023, at *22. Accord id. at *23-*25.
. Id. at *25. Accord id. at *26-*27 (citing, inter alia, Basic, 485 U.S. at 231-32, 108 S.Ct. 978, Mayhew, 121 F.3d at 51, and Ganino, 228 F.3d at 162).
. See United States v. Tarallo, 380 F.3d 1174, 1182 (9th Cir.2004) ("[A] reasonable investor would find the level of risk to be important in deciding whether to invest.”); Stanard, 2009 WL 196023, at *23-*25.
. If further discovery reveals that, indeed, the interests of Class members that purchased before September 5, 2008 diverge from those who purchased after that date, I am confident that there are sufficient case management tools to ensure that all members of the Class are protected. These tools include, but are not limited to, the authority to alter or amend the class certification order pursuant to Rule 23(c)(1)(c), to certify subclasses pursuant to Rule 23(c)(5), and the authority to issue orders ensuring "the fair and efficient conduct of the action” under Rule 23(d). Advisory Commit tee Note on Subdivision (d). See also In re Flag Telecom, 574 F.3d at 37; Marisol
. Def. Opp. at 17 (citing Lentell, 396 F.3d at 173, Dura, 544 U.S. at 342, 125 S.Ct. 1627; Lattanzio v. Deloitte & Touche LLP, 476 F.3d 147, 157-58 (2d Cir.2007)) (emphasis added).
. Lentell, 396 F.3d at 176 ("Plaintiffs do allege that Merrill's 'material misrepresentations and omissions induced a disparity between the transaction price and the true investment quality’ of 24/7 Media and Interliant securities; ‘that the market price of [the] securities was artificially inflated’; and that the securities were acquired 'at artificially inflated prices and [the plaintiffs] were damaged thereby.' Assuming (as we must) the truth of these allegations, they may establish transaction causation; but they do not provide the necessary causal link between Merrill’s fraud and plaintiffs’ losses." ) (citing Emergent Capital, 343 F.3d at 198) (quotation marks omitted and emphasis added)). Accord In re Flag Telecom, 574 F.3d at 40 ("In Lentell, we described the two requirements necessary to establish loss causation: 1) the loss must be foreseeable, and 2) the loss must have been caused by the materialization of the concealed risk.”); see also Dura, 544 U.S. at 342-346, 125 S.Ct. 1627 (rejecting the view that an inflated purchase price is sufficient to plead loss causation on 10(b) claims, recognizing that while "an initially inflated purchase price might mean a later loss ... that is far from inevitably so” as "that lower price may reflect, not the earlier misrepresentation, but changed economic circumstances, changed investor expectations, new industry-specific or firm-specific facts, conditions, or other events, which taken separately or together account for some or all of that lower price”) (citation omitted and emphasis added); Lattanzio, 476 F.3d at 157-58 (defining loss causation as requiring that the misstatement be "the 'proximate cause’ of an investment loss if the risk that caused the loss was within the zone of risk concealed by the misrepresentations ...
. Stulz Report ¶ 50 (quoting Sadia September 26, 2008 conference call transcript). Accord Def. Opp. at 15.
. See Stulz Report ¶ 50.
. Vellrath Reply ¶ 14 (emphasis added).
. Id.
. Id. V 6.
. Def. Opp. at 15 (citing Stulz Report ¶ 50).
. Vellrath Reply ¶ 17.
. See id.
. Stulz Report ¶ 12. Accord Def. Mem. at 18-20.
. See Stulz Report ¶ 12 (citing Financial Turmoil Timeline, New York Federal Reserve Bank, available at www.newyorkfed.org/research/ globaLeconomy/Crisis_Timeline.pdf).
. See In re Tronox, Inc. Sec. Litig., No. 09 Civ. 6220, 2010 U.S. Dist. LEXIS 67664, 2010 WL 2835545 at *55-*58 (S.D.N.Y. June 28, 2010); King County, Wash. v. IKB Deutsche Indstriebank AG, Nos. 09 Civ. 8387, 09 Civ. 8822, 708 F.Supp.2d 334, 341-47, 2010 WL 1702196, at *4-*7 (S.D.N.Y. Apr.26, 2010).
. See Vellrath Report ¶ 42.
. See Def. Opp. at 18.
. See In re Flag Telecom, 574 F.3d at 40-41.
. See Hr'gTr. at 17:16-18:1.
. Pl. Mem. at 18.
. Vellrath Report ¶ 52.
. Id.
. Id. ¶ 53. I note that Vellrath has not cited a single study or academic report to support his assertion that baekcasting is indeed a common and generally accepted method of estimating a true price line.
. Id.
. See id. ¶ 54.
. See id.
. See id. ¶ 57.
. See id.
. See id.
. See id.
. See id. ¶¶ 58, 61.
. See Stulz Report ¶¶ 43-66.
. Id. ¶ 44.
. Id.
. See Def. Opp. at 14 (citing Stulz Report ¶¶ 11, 44 ("The magnitude of the cash loss was greater than analyst forecasts of Sadia’s expected net income for 2008, the transaction loss wiped out one year’s earnings for Sadia, and it represented roughly three-quarters of one year’s capital expenditures and roughly 10% of Sadia’s debt.”)).
. See Vellrath Reply ¶ 24 (citing Ingo Walter, "Reputational Risk and Conflicts of Interest in Banking and Finance: The Evidence So Far,” J. Fin. Transformation, at 40 (2007), Ex. 3 to Gross Decl.).
. See id. ¶¶ 19-28.
. See, e.g., Walter, supra n. 175, at 40 ("[A] reputation-sensitive event might occur that triggers an identifiable monetary decline in the market value of the firm. After subtracting from this market capitalization loss the present value of direct and allocated costs, such as fines, penalties, and settlements under civil litigation, the balance can be ascribed to the impact on the firm’s reputation.”); id. at 44 (endorsing the use of an event study to determine reputational risk "where the reputational-sensitive event was 'clean' in terms of the release of the relevant information to the market”); Giuseppina Can
. Walter, supra n. 175, at 40. Accord id. at 44 ("Financial firms continue to encounter serious instances of reputation loss due to misconduct despite its effects on the value of their franchises”); Jonathan M. Karpoff et al., "The Cost to Firms of Cooking the Books,” 43 /. Fin. & Quantitative Analysis, at 27-29 (2006), Ex. 6 to Gross Decl. (finding that reputational losses are far larger than the cost of fines, class action settlements and accounting write-offs resulting from the events in question).
. I also note that all except one focuses on reputational loss in the financial services or banking industry with no indication that their results are appropriately extrapolated to other industries. See Walter, supra n. 175, at 40 ("Financial services ... are special because they deal mainly with other people's money, and because problems that arise in financial intermediation can trigger serious external costs”); Cannas, supra n. 177, at 76 ("This paper aims to measure reputational effects for financial institutions ....”) (emphasis added); Costanza Consolandi, et al., "US Financial Institutions: Reputational Risk and Senior Management Sell Decisions,” Working Paper, 1 (2009) (accepted and presented at the 2009 European Financial Management Symposium), Ex. 5 to Gross Decl.
. Vellrath Reply ¶ 23 (quoting Walter, supra n. 175, at 40) (emphasis added).
. Id.
. The full quote reads: "Reputational risk is usually the consequence of management processes rather than discrete events, and therefore requires risk control approaches that differ materially from operational risk.” Walter, supra n. 175, at 40.
. Reply Report of Professor Rene Stulz ¶ 16.
. Vellrath Reply ¶ 23 (citing Cannas, supra n. 177, at 69; Consolandi, supra n. 179, at 7-8). Vellrath did not originally provide page citations for either of these two articles. At the Court's request, Vellrath submitted the indicated page citations.
. See Cannas, supra n. 177, at 80 (concluding that there is an "evident reputational effect due to internal fraud events” that is “revealed through a sharp negative impact on the [cumulative abnormal return] values” and that "the negative impact progressively diminishes after sometime”) (emphasis added); Consolandi, supra n. 179, at 2-3, 14 (considering the impact of insider trading on share prices and arguing that insider sales have reputational consequences for financial institutions, but focusing on changes after the insider sale and drawing no conclusions about whether the reputational impact can be backcast at a constant level).
. See In re NYSE Specialists Sec. Litig., 260 F.R.D. 55, 74 (S.D.N.Y.2009) ("Conflicts over damages, at this early stage in the litigation, need not defeat a motion for certification.”) (citing In re WorldCom, 219 F.R.D. at 302 ("When liability can be determined on a class-wide basis, individualized damage issues are not ordinarily a bar to class certification.”)).