delivered the opinion of the Court.
These consolidated cases raise two unresolved questions concerning § 10(b) of the Securities Exchange Act of 1934 (1934 Act), 48 Stat. 891, 15 U. S. C. §78j(b). The first is whether purchasers of registered securities who allege they were defrauded by misrepresentations in a registration statement may maintain an action under § 10(b) notwithstanding the express remedy for misstatements and omissions in registration statements provided by § 11 of the Securities Act of 1933 (1933 Act), 48 Stat. 82, as amended, 15 U. S. C. §77k. The second question is whether persons seeking recovery under § 10(b) must prove their cause of action by clear and convincing evidence rather than by a preponderance of the evidence.
I
In 1969 Texas International Speedway, Inc. (TIS), filed a registration statement and prospectus with the Securities and Exchange Commission offering a total of $4,398,900 in securities to the public. The proceeds of the sale were to be used to finance the construction of an automobile speedway. The entire issue was sold on the offering date, October 30, 1969. TIS did not meet with success, however, and the corporation filed a petition for bankruptcy on November 30, 1970.
*378 In 1972 plaintiffs Huddleston and Bradley instituted a class action in the United States District Court for the Southern District of Texas 1 on behalf of themselves and other purchasers of TIS securities. The complaint alleged violations of § 10(b) of the 1934 Act and SEC Rule 10b-5 promulgated thereunder, 17 CFR §240.10b-5 (1982). 2 Plaintiffs sued most of the participants in the offering, including the accounting firm, Herman & MacLean, which had issued an opinion concerning certain financial statements and a pro forma balance sheet 3 that were contained in the registration statement and prospectus. Plaintiffs claimed that the defendants had engaged in a fraudulent scheme to misrepresent or conceal material facts regarding the financial condition of TIS, including the costs incurred in building the speedway.
After a 3-week trial, the District Judge submitted the case to the jury on special interrogatories relating to liability. The judge instructed the jury that liability could be found only if the defendants acted with scienter. 4 The judge also instructed the jury to determine whether plaintiffs had proved their cause of action by a preponderance of the evi *379 dence. After the jury rendered a verdict in favor of the plaintiffs on the submitted issues, the judge concluded that Herman & MacLean and others had violated § 10(b) and Rule 10b-5 by making fraudulent misrepresentations in the TIS registration statement. 5 The court then determined the amount of damages and entered judgment for the plaintiffs.
On appeal, the United States Court of Appeals for the Fifth Circuit held that a cause of action may be maintained under § 10(b) of the 1934 Act for fraudulent misrepresentations and omissions even when that conduct might also be actionable under § 11 of the 1933 Act.
We granted certiorari to consider whether an implied cause of action under § 10(b) of the 1934 Act will lie for conduct subject to an express civil remedy under the 1933 Act, an issue we have previously reserved,
6
and to decide the standard of proof applicable to actions under § 10(b).
7
HH H-1
The Securities Act of 1933 and the 1934 Act “constitute interrelated components of the federal regulatory scheme governing transactions in securities.”
Ernst & Ernst
v.
Hochfelder,
*381 The issue in this case is whether a party should be barred from invoking this established remedy for fraud because the allegedly fraudulent conduct would apparently also provide the basis for a damages action under §11 of the 1933 Act. 11 The resolution of this issue turns on the fact that the two provisions involve distinct causes of action and were intended to address different types of wrongdoing.
Section 11 of the 1933 Act allows purchasers of a registered security to sue certain enumerated parties in a registered offering when false or misleading information is included in a registration statement. The section was designed to assure compliance with the disclosure provisions of the Act by imposing a stringent standard of liability 12 on the parties who *382 play a direct role in a registered offering. 13 If a plaintiff purchased a security issued pursuant to a registration statement, he need only show a material misstatement or omission to establish his prima facie case. Liability against the issuer of a security is virtually absolute, 14 even for innocent misstatements. Other defendants bear the burden of demonstrating due diligence. See 15 U. S. C. §77k(b).
Although limited in scope, § 11 places a relatively minimal burden on a plaintiff. In contrast, § 10(b) is a “catchall” anti-fraud provision, 15 but it requires a plaintiff to carry a heavier burden to establish a cause of action. While a §11 action must be brought by a purchaser of a registered security, must be based on misstatements or omissions in a registration statement, and can only be brought against certain parties, a § 10(b) action can be brought by a purchaser or seller of “any security” against “cmy person” who has used “any manipulative or deceptive device or contrivance” in connection with the purchase or sale of a security. 15 U. S. C. § 78j (emphasis added). However, a § 10(b) plaintiff carries a heavier burden than a § 11 plaintiff. Most significantly, he must prove that the defendant acted with scienter, i. e., with intent to deceive, manipulate, or defraud. 16
Since § 11 and § 10(b) address different types of wrongdoing, we see no reason to carve out an exception to § 10(b) for fraud occurring in a registration statement just because the *383 same conduct may also be actionable under § 11. 17 Exempting such conduct from liability under § 10(b) would conflict with the basic purpose of the 1933 Act: to provide greater protection to purchasers of registered securities. It would be anomalous indeed if the special protection afforded to purchasers in a registered offering by the 1933 Act were deemed to deprive such purchasers of the protections against manipulation and deception that § 10(b) makes available to all persons who deal in securities.
While some conduct actionable under § 11 may also be actionable under § 10(b), it is hardly a novel proposition that the 1934 Act and the 1933 Act “prohibit some of the same conduct.”
United States
v.
Naftalin,
This conclusion is reinforced by our reasoning in
Ernst & Ernst
v.
Hochfelder,
which held that actions under § 10(b) require proof of scienter and do not encompass negligent conduct. In so holding, we noted that each of the express civil
*384
remedies in the 1933 Act allowing recovery for negligent conduct is subject to procedural restrictions not applicable to a § 10(b) action.
18
This cumulative construction of the remedies under the 1933 and 1934 Acts is also supported by the fact that, when Congress comprehensively revised the securities laws in 1975, a consistent line of judicial decisions had permitted plaintiffs to sue under § 10(b) regardless of the availability of express remedies. In 1975 Congress enacted the “most substantial and significant revision of this country’s Federal securities laws since the passage of the Securities Exchange
*385
Act in 1934.”
20
See Securities Acts Amendments of 1975, Pub. L. 94-29, 89 Stat. 97. When Congress acted, federal courts had consistently and routinely permitted a plaintiff to proceed under § 10(b) even where express remedies under §11 or other provisions were available.
21
In light of this
*386
well-established judicial interpretation, Congress’ decision to leave § 10(b) intact suggests that Congress ratified the cumulative nature of the § 10(b) action. See
Merrill Lynch, Pierce, Fenner & Smith, Inc.
v.
Curran,
A cumulative construction of the securities laws also furthers their broad remedial purposes. In enacting the 1934 Act, Congress stated that its purpose was “to impose requirements necessary to make [securities] regulation and control reasonably complete and effective.” 15 U. S. C. § 78b. In furtherance of that objective, § 10(b) makes it unlawful to use
“any
manipulative or deceptive device or contrivance” in connection with the purchase or sale of any security. The effectiveness of the broad proscription against fraud in § 10(b) would be undermined if its scope were restricted by the existence of an express remedy under § 11.
22
Yet we have repeatedly recognized that securities laws combating fraud should be construed “not technically and
*387
restrictively, but flexibly to effectuate [their] remedial purposes.”
SEC
v.
Capital Gains Research Bureau, Inc.,
Accordingly, we hold that the availability of an express remedy under §11 of the 1933 Act does not preclude defrauded purchasers of registered securities from maintaining an action under § 10(b) of the 1934 Act. To this extent the judgment of the Court of Appeals is affirmed.
HH HH I — I
In a typical civil suit for money damages, plaintiffs must prove their casé by a preponderance of the evidence.
24
Similarly, in an action by the SEC to establish fraud under § 17(a) of the 1933 Act, 15 U. S. C. § 77q(a), we have held that proof by a preponderance of the evidence suffices to establish liability.
SEC
v. C.
M. Joiner Leasing Corp.,
The Court of Appeals nonetheless held that plaintiffs in a § 10(b) suit must establish their case by clear and convincing evidence. The Court of Appeals relied primarily on the traditional use of a higher burden of proof in civil fraud actions at common law.
Where Congress has not prescribed the appropriate standard of proof and the Constitution does not dictate a particular standard, we must prescribe one. See
Steadman
v.
SEC,
A preponderance-of-the-evidence standard allows both parties to “share the risk of error in roughly equal fashion.” Addington v. Texas, supra, at 423. Any other standard expresses a preference for one side’s interests. The balance of interests in this case warrants use of the preponderance standard. On the one hand, the defendants face the risk of opprobrium that may result from a finding of fraudulent conduct, but this risk is identical to that in an action under § 17(a), which is governed by the preponderance-of-the-evidence standard. The interests of defendants in a securities case do not differ qualitatively from the interests of defendants sued for violations of other federal statutes such as the antitrust or civil rights laws, for which proof by a preponderance of the evidence suffices. On the other hand, the interests of plaintiffs in such suits are significant. Defrauded investors are among the very individuals Congress sought to protect in the securities laws. If they prove that it is more likely than not that they were defrauded, they should recover.
We therefore decline to depart from the preponderance-of-the-evidence standard generally applicable in civil actions. 30 *391 Accordingly, the Court of Appeals’ decision as to the appropriate standard of proof is reversed.
IV
The judgment of the Court of Appeals is affirmed in part and reversed in part, and the cases are otherwise remanded for proceedings consistent with this opinion.
It is so ordered.
Notes
The case was transferred to the United States District Court for the Northern District of Texas in January 1973.
Plaintiffs also alleged violations of,
inter alia,
§ 17(a) of the 1933 Act, 15 U. S. C. § 77q(a). We have previously reserved decision on whether § 17(a) affords a private remedy,
Teamsters
v.
Daniel,
A pro forma balance sheet is one prepared on the basis of assumptions as to future events.
The judge stated that reckless behavior could satisfy the scienter requirement. While this instruction reflects the prevailing view of the Courts of Appeals that have addressed the issue, see
McLean
v.
Alexander,
The trial court also found that Herman & MacLean had aided and abetted violations of § 10(b). While several Courts of Appeals have permitted aider-and-abettor liability, see
IIT, An International Investment Trust
v.
Cornfeld,
See,
e. g., Blue Chip Stamps
v.
Manor Drug Stores,
The Fifth Circuit’s adoption of a clear-and-convincing-evidence standard in a private action under § 10(b) appears to be unprecedented. See 3 E. Devitt & C. Blackmar, Federal Jury Practice and Instructions § 98.04, p. 930 (3d ed., 1981 Cum. Supp.). Other courts have employed a preponderance-of-the-evidence standard in private actions under the securities
*380
laws. See,
e. g., Mihara
v.
Dean Witter & Co.,
1933 Act, §§ 11, 12, 15, 15 U. S. C. §§ 77k, 111, 77o; 1934 Act, §§ 9, 16, 18, 15 U. S. C. §§ 78i, 78p, 78r.
See,
e. g., J. I. Case Co.
v.
Borak,
The right of action was first recognized in
Kardon
v.
National Gypsum Co.,
The Court of Appeals noted that the plaintiffs “apparently did have a Section 11 remedy.”
See H. R. Rep. No. 85, 73d Cong., 1st Sess., 9 (1933) (Section 11 creates “correspondingly heavier legal liability” in line with responsibility to the public).
A § 11 action can be brought only against certain parties such as the issuer, its directors or partners, underwriters, and accountants who are named as having prepared or certified the registration statement. See 15 U. S. C. § 77k(a). At the same time, §§ 3 and 4 of the 1933 Act exclude a wide variety of securities (such as those issued by the Government and certain banks) and transactions (such as private ones and certain small offerings) from the registration requirement. 15 U. S. C. §§ 77c and 77d.
See
Feit
v.
Leasco Data Processing Equipment Corp.,
See
Chiarella
v.
United States,
See Ernst & Ernst v. Hochfelder, supra, at 193.
Cf.
Mills
v.
Electric Auto-Lite Co.,
For example, a plaintiff in a § 11 action may be required to post a bond for costs, 15 U. S. C. § 77k(e), and the statute of limitations is only one year, § 77m. In contrast, § 10(b) contains no provision requiring plaintiffs to post security for costs. Also, courts look to the most analogous statute of limitations of the forum State, which is usually longer than the period provided for § 11 actions. See
Ernst & Ernst
v.
Hochfelder,
See
Fischman
v.
Raytheon Mfg. Co.,
Securities Acts Amendments of 1975: Hearings on S. 249 before the Subcommittee on Securities of the Senate Committee on Banking, Housing and Urban Affairs, 94th Cong., 1st Sess., 1 (1975). As the Conference Report on the legislation explained, the 1975 Amendments were the culmination of “the most searching reexamination of the competitive, statutory, and economic issues facing the securities markets, the securities industry, and, of course, public investors, since the 1930’s.” H. R. Conf. Rep. No. 94-229, p. 91 (1975).
See,
e. g., Schaefer
v.
First National Bank of Lincolnwood,
Moreover, certain individuals who play a part in preparing the registration statement generally cannot be reached by a § 11 action. These include corporate officers other than those specified in 15 U. S. C. § 77k(a), lawyers not acting as “experts,” and accountants with respect to parts of a registration statement which they are not named as having prepared or certified. If, as Herman & MacLean argues, purchasers in registered offerings were required to rely solely on § 11, they would have no recourse against such individuals even if the excluded parties engaged in fraudulent conduct while participating in the registration statement. The exempted individuals would be immune from federal liability for fraudulent conduct even though § 10(b) extends to “any person” who engages in fraud in connection with a purchase or sale of securities.
We also reject application of the maxim of statutory construction,
expressio unius est exclusio alterius.
See H. Hart & A. Sacks, The Legal Process: Basic Problems in the Making and Application of Law 1173-1174 (tent. ed. 1958); Note, Implying Civil Remedies from Federal Regulatory Statutes, 77 Harv. L. Rev. 285, 290-291 (1963). As we stated in
SEC
v.
C. M. Joiner Leasing Corp.,
See
Addington
v.
Texas,
See
Steadman
v.
SEC,
See n. 7, supra.
A higher standard of proof apparently arose in courts of equity when the chancellor faced claims that were unenforceable at law because of the Statute of Wills, the Statute of Frauds, or the parol evidence rule. See Note, Appellate Review in the Federal Courts of Findings Requiring More than a Preponderance of the Evidence, 60 Harv. L. Rev. 111, 112 (1946). Concerned that claims would be fabricated, the chancery courts imposed a more demanding standard of proof. The higher standard subsequently received wide acceptance in equity proceedings to set aside presumptively valid written instruments on account of fraud. See
United States
v.
American Bell Telephone Co.,
See
SEC
v.
Capital Gains Research Bureau, Inc.,
In
Vance
v.
Terrazas,
The Court of Appeals also noted that the proof of scienter required in fraud cases is often a matter of inference from circumstantial evidence. If
*391
anything, the difficulty of proving the defendant’s state of mind supports a lower standard of proof. In any event, we have noted elsewhere that circumstantial evidence can be more than sufficient.
Michalic
v.
Cleveland Tankers, Inc.,
