OPINION OF THE COURT
This is an appeal from an order of the district court granting Towers, Perrin, Forster & Crosby’s (TPFC) petition compelling arbitration and staying an action brought by Brown and Riding in the state court in California. Jurisdiction in the district court was based on diversity. The order compelling arbitration is appealable under 28 U.S.C. § 1291.
Gavlik Construction Co. v. H.F. Campbell Co.,
I
Brown and Riding were employed as insurance agents and brokers in TPFC’s San Francisco, California office. As one of the perquisites of employment they became eligible to purchase TPFC shares. Only employees were permitted to be shareholders, and the company repurchased shares held by employees who left the firm. The terms and conditions of share ownership were specified in a Shareholder’s Agreement, which was later made part of TPFC’s bylaws.
Among the terms in the Shareholder’s Agreement was a noncompetition covenant, which provided that a stockholder leaving TPFC would forfeit the increase over purchase price of his shares unless he agreed not to compete with TPFC for two years after leaving the firm. Another term in the Agreement provided that any dispute “with respect to the provisions” governing share ownership would be subject to arbitration.
Brown and Riding decided to leave TPFC and start a competing business. TPFC gave notice that it would not redeem their stock at its appreciated value unless they agreed to, and did, abide by the noncompetition covenant. Brown and Riding filed an *347 action in the state superior court seeking a declaratory judgment that the noncompetition and forfeiture provisions were unenforceable, and damages in the amount of the appreciation of their TPFC stock. In addition to its answer, TPFC filed a petition to compel arbitration pursuant to the California Arbitration Act, Cal.Civ.Proc.Code §§ 1280 et seq. The superior court denied the petition to compel arbitration, and TPFC appealed.
Over two months after TPFC’s petition in the state court was denied, and while its appeal was pending, TPFC filed a petition in the District Court for the Eastern District of Pennsylvania to compel arbitration pursuant to the Federal Arbitration Act, 9 U.S.C. §§ 1 et seq., and to stay the California proceedings. The district court denied Brown and Riding’s motion to dismiss, and TPFC moved for summary judgment. While this motion was pending, the California Court of Appeal affirmed the state court’s denial of TPFC’s petition on the ground that the Agreement involved employee compensation, and that California Labor Code § 229 prohibits arbitrating such disputes. The state supreme court denied TPFC’s petition for review on July 7, 1982. On August 25, 1982, the district court granted TPFC’s motion to compel arbitration and stayed the California proceedings on the merits. This appeal followed.
II
Brown and Riding argue that the district court’s order was error because the California decision that the dispute was not arbitrable is res judicata. The preclusive effect of the California judgment in the federal court is governed by 28 U.S.C. § 1738, which provides that state court judgments “shall have the same full faith and credit in every court ... as they have by law or usage in the courts of such State ... from which they are taken.” Thus, we must determine what preclusive effect California would give its own judgment in order to know what effect it should have been given in the district court.
Migra v. Warren City School District Board of Education,
— U.S. -,
In California, a subsequent suit between the same parties on the same cause of action is barred by res judicata if a prior suit was concluded on the merits by a court having subject matter jurisdiction.
Busick v. Workmen’s Compensation Appeals Board,
We first address whether the state court acted without subject matter jurisdiction. In proceedings in state or federal court to compel arbitration, the arbitrability of a dispute is governed by the Federal Arbitration Act if the arbitration provision is part of an agreement involving interstate commerce.
Southland Corp. v. Keating,
— U.S. -, ---,
TPFC next argues that the same cause of action is not involved in the California and the federal proceedings. For purposes of res judicata, California defines cause of action as “the obligation to be enforced.”
Panos, supra,
TPFC further contends that the order denying arbitration is not final for res judicata purposes. There appears to be no California decision that has determined whether an order denying arbitration is entitled to preclusive effect in subsequent proceedings. Thus, our duty is to predict how the California Supreme Court would treat such an order.
Cf. Compagnie des Bauxites de Guinee v. Insurance Company of North America,
Our first reason for predicting that this is a final order is that we do not believe that a subsequent petition to compel arbitration would be granted. What little case law there is on point indicates that the decision that a dispute is or is not arbitrable is conclusive of that issue.
In re Kahn,
A second reason in support of our prediction is that we believe this order meets the standard of finality for res judicata that the judgment be “free from attack on appeal.”
Morris v. McCauley’s Quality Transmission Service,
TPFC argues that the California order cannot be res judicata because the merits of the dispute have not yet been decided. Although a trial on the merits has yet to take place, we do not believe that the finality of the order denying arbitration is affected. There were essentially two separate actions in the California trial court: TPFC’s special proceeding to compel arbitration, and Brown and Riding’s action for a declaratory judgment and damages. In our view, the special proceeding finally determined the merits therein, i.e., the arbitrability of the dispute. Once a dispute has been found not arbitrable, the issue of arbitrability should not arise again during proceedings on the merits. The finality of the order entered in the special proceeding is not undermined by the fact that the outcome of the dispute itself must be resolved by a separate action. See
Cole v. BT & G, Inc.,
The gist of TPFC’s argument is that an interlocutory order can never be res judicata, but we do not agree that this is the case. In California, the preclusive effect of an order depends on what the order determines, not on whether it is deemed interlocutory.
In re Los Angeles County Pioneer Society,
TPFC also asserts that California’s “one final judgment” rule, under which there can be only one final judgment in any action, prevents the order denying arbitration from being res judicata. If we follow the view that the special proceeding was distinct from the litigation on the merits of the dispute, then the one final judgment rule does not prevent us from treating the order denying arbitration as final.
Cole, supra,
We emphasize that we do not and need not hold that in California any appealable order is final for res judicata purposes. See Restatement (Second) of Judgments, § 13 comment b. 2 All we are holding is that under the functional test of Los Angeles County Pioneer Society, supra, an order denying arbitration is final for purposes of res judicata, and that the one final judgment rule of appealability does not compel a contrary result.
Our conclusion that the California order is res judicata is consistent with the holdings in other federal courts that have considered similar situations.
See Ultracashmere House, supra; Depuy-Busching, supra. See also Moses H. Cone Memorial Hospital v. Mercury Construction Corp., supra,
TPFC next argues that California Labor Code § 229 cannot remove from arbitration a dispute which is arbitrable under the Federal act, and that the California decision should not be given full faith and credit because it violates the supremacy clause. Assuming that California Labor
*351
Code section 229 cannot affect a party’s right to arbitration under the Federal Arbitration Act, it does not follow that TPFC was entitled to prevail in the district court.
3
The lower federal courts have no appellate jurisdiction to review decisions of state courts. Under § 1738, we look only to how a California court would treat the prior judgment, and in California a judgment is res judicata even though incorrect on the law.
Slater v. Blackwood,
As a final matter, we reject TPFC’s argument that it should be excused for not raising its rights under federal law in state court, because the California court would have almost certainly relied on Labor Code § 229 to deny arbitration anyway. Assuming this to be true, TPFC had three options. First, it could split its defenses, asserting its rights under the California act in state court and its federal rights in federal court, and gamble that the federal court would order arbitration before the state court could issue an adverse judgment that would be res judicata. Second, TPFC could have raised the federal act in the state court and, if its petition were rejected based on Labor Code § 229, appealed all the way to the U.S. Supreme Court, as was successfully done in Keating. A third course would have been to remove Brown and Riding’s action to the District Court for the Northern District of California, based on diversity, and present the Federal Arbitration Act defense in what TPFC felt was a more sympathetic forum. TPFC gambled on the first course and lost. The consequence of TPFC’s decision is that its federal claim is barred by res judicata in the California state courts, and section
1738 requires us to recognize this bar in the federal court as well. 4 .
III
The district court’s order directing arbitration and staying the California proceedings will be reversed.
Notes
. At the time TPFC filed its petition in the state court, California courts applied the Federal Arbitration Act where the interstate commerce requirement was met.
Main v. Merrill Lynch, Pierce, Fenner & Smith,
. We express no opinion as to the controlling rule where the prior order was issued by a federal court.
. We have held this case under advisement pending the Supreme Court’s decision in Southland Corp. v. Keating, supra. Keating held that the supremacy clause rendered inapplicable a California statute prohibiting arbitration of franchise agreements, where the Federal Arbitration Act would permit arbitration. The case before us is distinguishable from Keating, because here TPFC never asserted its rights under the Federal Arbitration Act in the California litigation, so it cannot be said that the supremacy clause was violated.
. In view of our disposition of the res judicata issue, we need not address the other grounds for appeal raised by Brown and Riding.
