OPINION
Relator H & R Blоck Financial Advis-ors, Inc. filed the instant mandamus action seeking an order compelling the respondent 1 to enforce a contractual arbitration clause. Real party Andrew Michael Kryn-ik opposes enforcement, asserting that the arbitration provision is moot and that H & R Block waived arbitration by substantially invoking the judicial process. We conditionally grant the petition.
I. Factual And PROCEDURAL Background
When Krynik was a minor, his father opened two Uniform Gift to Minor Act accounts with The Olde Discount Corporation, now H & R Block. On January 30, 2008, Krynik sued H & R Block and his ex-stepmother, Julie Vieshe. Krynik contends that H & R Block wrongfully released his account proceeds to Vieshe, who absconded with the funds. H & R Block timely answered the suit, and asserted as an affirmative defense that Krynik’s claims are subject to the following contractual arbitration clause:
You agree to submit any and all controversies or claims arising out of the relationship established by this agreement ... to arbitration to be conducted according to the rules and procedures of the New York Stock Exchange, Inc. (NYSE) or thе National Association of Securities Dealers, Inc. (NASD), as you may elect, unless the claim or controversy is otherwise found not to be arbitra-ble....
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*899 Arbitration must be commenced by service of a written demand for arbitration and should indicate the election of NYSE or NASD arbitration proceedings.
Two weeks after answering, H&R Block moved to dismiss the lawsuit and compel arbitration under both the Texas General Arbitration Act and Federal Arbitration Act. Krynik responded initially that he did not sign the investor’s agreement; his father did. As a nonsignatory, Krynik denied that his claims were subject to the arbitration agreement. Accordingly, H & R Block moved for summary judgment and argued that, if Krynik was disavowing any contractual claims, the remainder of Krynik’s causes of action were time-barred.
At the hearing, Krynik acknowledged that his claims were subject to the arbitration clause. However, he argued that H & R Block substantially invoked the judicial process by moving for summary judgment, thereby waiving arbitration. The trial court suggested that, in lieu of arbitration per the terms of the arbitration clause, that is, according to the rules оf the NYSE or NASD, the parties appear before a local arbitrator instead. H&R Block declined that invitation, insisting that the trial court enforce the clause as written. The trial court denied the arbitration motion.
This mandamus proceeding ensued. On June 5, we stаyed all underlying proceedings pending resolution of this mandamus action.
II. Mandamus StandaRD Of Review
Mandamus relief will lie if the relator establishes a clear abuse of discretion for which there is no adequate remedy by appeal.
In re AutoNation, Inc.,
III. Mootness
We first address Krynik’s mootness claim, because mootness is a threshold issue that implicates subject matter jurisdiction.
See Speer v. Presbyterian Children’s Home & Serv. Agency,
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The mootness doctrine prevents courts from rendering advisory opinions, which are outside the jurisdiction conferred by article II, section 1 of the Texas Constitution.
See Valley Baptist Med. Ctr. v. Gonzalez,
The agreed-upon clause requires the parties to submit their dispute to arbitration “acсording to the rules and procedures” of the NYSE or NASD. Those two entities were consolidated following final regulatory approval from the Securities and Exchange Commission on July 26, 2007.
See Fin. Indus. Regulatory Auth., Inc. v. Fiero,
*901 Therefore, because the arbitration provision may be enforced as written, we hold that the arbitration issue is not moot. Acсordingly, we have subject matter jurisdiction over this mandamus proceeding and will address Krynik’s contention that H & R Block waived arbitration by moving for summary judgment.
IV. WAIVER
Krynik acknowledges the general validity of the arbitration provision, arguing instead that H&R Block waived enforcement when it moved for summary judgment. 6 We disagree.
A party waives its right to arbitration if it substantially invokes the judicial process to its opponent’s detriment.
See In re Bruce Terminix Co.,
Krynik cites only
Price v. Drexel Burnham Lambert, Inc.
to support his claim that H&R Block substantially invoked the judicial process.
A demand for arbitration puts a party on notice that arbitration may be forthcoming, and therefore, affords that party the opportunity to avoid compromising its position with respect to arbitrablе and nonarbitrable claims. Conversely, where a party fails to demand arbitration during pretrial proceedings, and, in the meantime, engages in pretrial activity inconsistent with an intent to arbitrate, the party later opposing a motion to compel arbitration may more easily show that its position has been compromised, i.e., prejudiced.
Id. at 1160-61. The party seeking arbitration in Price did far more than simply move for summary judgment as an alternative to its arbitration demand. See id. at 1158-59. The Fifth Circuit has concluded that an alternative summary judgment motion, by itself, does not wаive enforcement of an arbitration clause:
First, KUSA argues that CNAN waived its right because it filed an extensive summary judgment motion — in excess of 100 pages — with little evidence of an indication for arbitration. KUSA offers no legal authority for why a motion for summary judgment, filed from а defensive posture, can be characterized as an invocation of judicial process. Even assuming, arguendo, that it is, CNAN concurrently filed a motion to compel arbitration in the alternative to its motion *902 for summary judgment, removing any doubt as to waiver.
Keytrade,
Moreover, the Texas Supreme Court recently сonfirmed that waiver is decided not on one factor but, rather, on a totality-of-the-circumstanees test.
See In re Fleetwood Homes of Tex., L.P., 257
S.W.3d 692, 694-95 (Tex.2008) (orig.proceeding) (citing
Perry Homes v. Cull,
• H & R Block, the movant, is the defendant and did no more than respоnd to Krynik’s lawsuit;
• H & R Block immediately asserted the arbitration clause as an affirmative defense and moved for enforcement within two weeks of answering the lawsuit; and
• the summary judgment motion filed by H & R Block was presented as an alternative to its arbitration demand, only after Krynik claimed that hе was not a party to the contract containing the arbitration clause. 8
See Perry Homes,
We therefore hold that, as a matter of law, H & R Block did not substantially invoke the judicial process so as to waive enforcement of the contractual arbitration clause. Because courts are required to еnforce privately-negotiated arbitration agreements in accordance with their terms, 9 the trial court abused its discretion in denying H & R Block’s motion to compel arbitration.
Y. Dismissal Or Stay
Because Krynik’s claims against H & R Block are arbitrable, the trial court was required to stay the underlying lawsuit. See Tex. Civ. Prac. & Rem.Code Ann. §§ 171.021(c), 171.025 (Vernon 2005). 10
*903 Krynik argues that, because H & R Block requested dismissal — and not a stay — of his lawsuit, the trial court did not abuse its discretion in denying this requеst. Although we agree that dismissal is not mandatory, the trial court abused its discretion in failing to compel arbitration and stay the underlying proceedings.
Because Krynik’s claims against H <& R Block are arbitrable, the trial court judge was required, at a minimum, to stay the proceedings and order those clаims to arbitration.
See id.
§ 171.021(c) (“An order compelling arbitration must include a stay of any proceeding!.]”). Because he failed to do so, mandamus relief is warranted.
See Fleetwood Homes,
VI. Conclusion
We lift our stay order previously entered on June 5, 2008. We conditionally grant the petition for a writ of mandamus, and direct the trial court judge to stay the underlying lawsuit and compel Krynik’s claims against H & R Block to arbitration. The writ will issue only if the trial court fails to act in accordance with this opinion.
Notes
. The Honorable R. Jack Cagle, presiding judge of Harris County Court at Law No. 1.
. Although Krynik did not raise this argument before the trial court, mootness may be raised
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for the first time on appeal inasmuch as the parties must have a justiciable controversy at every stage of the legal proceedings, including the appeal.
See, e.g., Bd. of Adjustment of City of San Antonio v. Wende,
. The details of the consolidation are set forth in a release from the Securities and Exchange Commission.
See
Allocation of Regulatory Responsibilities, Exchange Act Release No. 34-56148, 72 Fed.Reg. 42146-01,
. See FINRA, Arbitration & Mediation — Code of Arbitration Procedure, available at http:// www.finra. org/Arbitra tionMediation/Arbitration/CodeofArbitrationProcedure/p009566; NASD Code of Arbitration Procedure for Customer Disputes, available at http://www.fmra. org/we b/groups/rules_regs/docu-ments/rule_fíling/pO18365 .pdf.
.We note that
Shammami
involved an arbitration clause requiring the parties to submit their controversy to "arbitration
before
the [NYSE] ... or the [NASD].”
Shammami,
. At the hearing, Krynik’s counsel conceded, "I agree that before they moved for summary judgment there was an enforceable arbitration agreement in the contract.”
. H&R Block requested arbitration under both the TAA and FAA. Krynik does not contest that the FAA applies, or that mandamus relief is proper to enforce an arbitration agreement governed by the FAA.
See In re Weekley Homes, L.P.,
.We are not persuaded by Krynik’s suggestion that the summary judgment motion was not filed as an alternative to the arbitration demand. H & R Block's motion to compel arbitration was filed first, on March 13, 2008. The summary judgment motion was filed more than a month later, on April 22, only after Krynik argued that the arbitration agreement was unenforceable as to him. The lead paragraphs in the summary judgment motion demonstrate that H & R Block requested summary judgment solely as an alternative to its arbitration demand:
Plaintiff has sued HRBFA for his ex-stepmother’s alleged conversion of funds from two Uniform Gift to Minors Act ("UGMA”) Accounts. Both accounts, which were opened for Plaintiff by his father[,] had arbitration clauses. When HRBFA moved to enforce these agreements, Plaintiff argued that he cannot be compelled to arbitration because he did not sign and is not a party to the account agreements
Plaintiff cannot have it both ways. Having attempted to escape arbitration by disavowing a contractual relationship, his claims are now barred by the 2 year statute of limitations.
At the hearing on both motions, H & R Block’s counsel recounted these events and expressly described the summary judgment motion as "alternative.” He requested first that the trial court order the case to arbitration but that, if the judge would not enforce arbitration, the summary judgment motion be granted. The trial court specifically recited that he understood the summary judgment to be subject to the ruling on the arbitration demand.
.
Volt Info. Scis., Inc. v. Bd. of Trs. of Leland Stanford Junior Univ.,
. Even where an arbitration agreement may be subject to the FAA, we still apply Texas law to resolve procedural issues.
Citigroup Global Mkts., Inc. v. Brown,
