Citigroup, Inc. v. Abu Dhabi Investment Authority

13-4825-cv
Citigroup, Inc. v. Abu Dhabi Investment Authority
UNITED STATES COURT OF APPEALS
FOR THE SECOND CIRCUIT
August Term, 2014
(Submitted: December 9, 2014 Decided: January 14, 2015)
Docket No. 13-4825-cv
________________________________________________________________________
C ITIGROUP, I NC.,
Plaintiff-Appellant,
- v. -
A BU DHABI I NVESTMENT A UTHORITY ,
Defendant-Appellee.
________________________________________________________________________
Before:
WESLEY , HALL, and LYNCH , Circuit Judges.
Appeal from the district court’s judgment dismissing the complaint of Citigroup, Inc.
and compelling arbitration pursuant to an arbitration clause contained in the parties’
contract. We hold that the “extraordinary remedies” authorized by the All Writs Act, 28
U.S.C. § 1651, do not permit a district court to enjoin an arbitration based on whatever
claim-preclusive effect may result from the court’s prior judgment when that judgment
merely confirmed the result of the parties’ earlier arbitration without considering the merits
of the underlying claims at issue in that arbitration.
AFFIRMED.
LESLIE GORDON FAGEN (Brad S. Karp and Gregory F.
Laufer, on the brief), Paul, Weiss, Rifkind, Wharton &
Garrison LLP, New York, NY, for Plaintiff-Appellant
Citigroup, Inc.
S ANFORD I. WEISBURST (Peter E. Calamari and Tai-
Heng Cheng, on the brief), Quinn Emanuel Urquhart &
Sullivan, LLP, New York, NY, for Defendant-Appellee Abu
Dhabi Investment Authority.

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H ALL, Circuit Judge:
This case presents the question of whether the All Writs Act, 28 U.S.C. § 1651(a),
permits a federal district court to enjoin a second arbitration between parties to a contractual
arbitration agreement based on what one party asserts is the claim-preclusive effect of a prior
federal judgment confirming the result of the parties’ earlier arbitration. We hold that the
“extraordinary remedies” authorized by the All Writs Act cannot be used to enjoin an
arbitration based on whatever claim-preclusive effect may result from the district court’s
prior judgment when that judgment merely confirmed the result of the parties’ earlier
arbitration without considering the merits of the underlying claims at issue in that
arbitration. We concur with the district court that Appellant Citigroup, Inc. has not
demonstrated an adequate basis for an extraordinary injunction pursuant to the All Writs Act
and affirm the judgment dismissing Citigroup’s complaint and compelling arbitration.
BACKGROUD
The facts are straightforward. Citigroup, Inc. and the Abu Dhabi Investment
Authority (“ADIA”) were parties to an Investment Agreement under which ADIA invested
billions of dollars in Citigroup. The Agreement contained an arbitration clause providing
that “any dispute that arises out of or relates to the [Agreement], or the breach thereof, . . .
will be decided through arbitration administered by the American Arbitration Association.”
J.A. 163. In 2009, ADIA commenced arbitration proceedings pursuant to this clause,
alleging that Citigroup had diluted the value of its investment by issuing preferred shares to
other investors. See Abu Dhabi Inv. Auth. v. Citigroup, Inc., No. 12-cv-283, 2013 WL 789642,
at *1 (S.D.N.Y. Mar. 4, 2013). It asserted claims of fraud, securities fraud, negligent

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misrepresentation, breach of fiduciary duty, breach of contract, and breach of the implied
covenant of good faith and fair dealing. Id. The arbitrators rejected ADIA’s claims and
returned an award in favor of Citigroup after a lengthy and hard-fought proceeding that
included extensive discovery and a multi-day hearing. Id. Citigroup moved in the United
States District Court for the Southern District of New York for entry of an order confirming
the award. The district court (Daniels, J.) granted Citigroup’s motion, rejecting ADIA’s
arguments that the award should be vacated on the grounds that the arbitrators’ choice-of-
law ruling and two evidentiary rulings were made in manifest disregard of the law and
prevented ADIA from presenting its case. See id. at *1, 9. ADIA appealed, and this Court
affirmed, holding that the arbitrators did not act in manifest disregard of the law or exceed
their authority. Abu Dhabi Inv. Auth. v. Citigroup, Inc., 557 F. App’x 66, 67–68 (2d Cir. Feb.
19, 2014).
In August 2013, while the district court’s confirmation judgment remained pending
before this Court on appeal, ADIA served Citigroup with a new notice of arbitration
pursuant to the Investment Agreement, again asserting claims of breach of contract and
breach of the implied covenant of good faith and fair dealing. Shortly thereafter, Citigroup
instituted this action pursuant to the Declaratory Judgment Act, the All Writs Act, the
Federal Arbitration Act (“FAA”), 9 U.S.C. § 1, et seq., and the district court’s “inherent
authority to protect its proceedings and judgments.” By way of relief, Citigroup sought to
enjoin the second arbitration on the ground that ADIA’s new claims were barred by the
doctrine of claim preclusion, or res judicata, because they were or could have been raised in

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the first arbitration.1 Citigroup maintained that the second arbitration constituted an
“assault” on the district court’s March 2013 judgment confirming the first award, and that
applying the All Writs Act to enjoin the second arbitration was necessary to protect the
integrity of that judgment. ADIA moved to dismiss Citigroup’s complaint and to compel
arbitration.
The district court (Castel, J.) granted ADIA’s motions. After first flagging the strong
federal policy favoring arbitration, the district court then pointed to our decision in National
Union Fire Insurance Co. of Pittsburgh, PA v. Belco Petroleum Corp. (“Belco”), 88 F.3d 129 (2d Cir.
1996), in which we held that the preclusive effect of a prior arbitration that had been
confirmed by a state court was to be decided by the arbitrators, not the court. Given our
holding in Belco, other similar decisions, and the parties’ “broad arbitration clause” governing
“any dispute that arises out of the” Investment Agreement, the district court held that
Citigroup’s preclusion defense was properly resolved in arbitration. See Citigroup, Inc. v. Abu
Dhabi Inv. Auth., No. 13-cv-6073, 2013 WL 6171315, at *3–5 (S.D.N.Y. Nov. 25, 2013).
Regarding Citigroup’s request to enjoin the second arbitration pursuant to the All
Writs Act, the district court first observed that our decision in In re American Express Financial
Advisors Securities Litigation, 672 F.3d 113 (2d Cir. 2011), “allow[ed] the possibility that, in
certain circumstances, the All Writs Act could permit a court to enjoin an arbitration.”
Citigroup, Inc., 2013 WL 6171315, at *5. The court noted, however, that we had previously
1 The doctrine of claim preclusion, or res judicata, bars the subsequent litigation of any claims
that were or could have been raised in a prior action. See Federated Dep’t Stores, Inc. v. Moitie,
452 U.S. 394, 398 (1981).

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sanctioned the use of the Act to enjoin arbitration only when the arbitration threatened to
undermine a longstanding federal consent judgment that encompassed extensive equitable
relief. See Local 1814 Int’l Longshoremen’s Ass’n, AFL-CIO v. N.Y. Shipping Ass’n, Inc., 965 F.2d
1224, 1237–38 (2d Cir. 1992). Citigroup’s case, by contrast, presented only “garden-variety
res judicata concerns” because there was “no separate, ongoing proceeding at risk of being
undermined” by the second arbitration. Citigroup, Inc., 2013 WL 6171315, at *5. Accepting
the argument that application of the All Writs Act was necessary in the circumstances of
Citigroup’s case, the district court reasoned, would “swallow the Belco rule” because it
“would apply to virtually any instance where a second arbitration is purportedly precluded by
a federal court judgment confirming the first arbitration award.” Id. Accordingly, the court
held that there was “no basis for an extraordinary remedy to issue under the All Writs Act.”
Id. at *6.
Citigroup timely appealed the resulting judgment.
DISCUSSION
Here, it is undisputed that two sophisticated parties voluntarily contracted to
arbitrate “any dispute” arising from or relating to their Investment Agreement. As provided
for under the FAA, the district court’s March 2013 judgment merely confirmed the result of
the parties’ earlier arbitration through a limited procedure that did not require consideration
of the merits of the underlying claims. The sole issue in this appeal is whether the district
court erred when it refused to enjoin the second arbitration pursuant to the All Writs Act

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based on what Citigroup asserts is the claim-preclusive effect of the March 2013 judgment
and instead compelled the parties to arbitrate ADIA’s second set of claims.2
The resolution of this issue implicates competing considerations. On the one hand,
the FAA expresses “a national policy favoring arbitration when the parties contract for that
mode of dispute resolution.” Preston v. Ferrer, 552 U.S. 346, 349 (2008). The FAA’s
framework, moreover, authorizes the federal courts to conduct only a limited review of
discrete issues before compelling arbitration, leaving the resolution of all other disputes to
the arbitrators. See Howsam v. Dean Witter Reynolds, Inc., 537 U.S. 79, 83–84 (2002). Set
against these considerations, on the other hand, is the weighty practical concern for the
integrity of federal judgments that could arise if parties felt free to relitigate in arbitration
proceedings claims previously resolved by a federal court. See In re Am. Express Fin. Advisors
Sec. Litig. (“American Express”), 672 F.3d 113, 140 (2d Cir. 2011). In recognition of this
concern, several of our sister circuits have held that the All Writs Act, which empowers the
federal courts to “issue all writs necessary or appropriate in aid of their respective
jurisdictions,” 28 U.S.C. § 1651(a), permits district courts to enjoin arbitrations that threaten
to undermine federal judgments. See, e.g., In re Y & A Grp. Sec. Litig., 38 F.3d 380, 382–83
(8th Cir. 1994). Borrowing language from the Third Circuit, we have characterized these
competing considerations as presenting “‘a high order challenge.’” American Express, 672
F.3d at 140, 141 n.20 (quoting John Hancock Mut. Life Ins. Co. v. Olick, 151 F.3d 132, 138 (3d
2 We review de novo the district court’s decision to compel arbitration. See Cap Gemini Ernst
& Young, U.S., LLC v. Nackel, 346 F.3d 360, 364 (2d Cir. 2003).

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Cir. 1998)). We now must decide the proper balance that should be struck between them in
this case.
In addition to manifesting a policy strongly favoring arbitration when contracted for
by parties to a dispute, the FAA establishes a “body of federal substantive law of
arbitrability[] applicable to any arbitration agreement within coverage of the Act,” Moses H.
Cone Mem. Hosp. v. Mercury Constr. Corp., 460 U.S. 1, 24 (1983), and also “supplies . . . a
procedural framework applicable in federal courts,” Preston, 552 U.S. at 349. Under this
framework, most disputes between parties to a binding arbitration agreement are
“arbitrable,” meaning that they are to be decided by the arbitrators, not the courts. See
Howsam, 537 U.S. at 83–84. There is one exception to this general rule: unless the parties
“unmistakably” provide otherwise, courts are to decide “question[s] of arbitrability.” Id. at
83. Such questions include disputes “about whether the parties are bound by a given
arbitration clause” or “disagreement[s] about whether an arbitration clause in a concededly
binding contract applies to a particular type of controversy.” Id. at 84. All other “questions
which grow out of the dispute and bear on its final disposition are presumptively not for the
judge, but for an arbitrator, to decide.” Id. at 84–85 (internal quotation marks omitted)
(identifying time limits, notice, laches, and estoppel as examples of arbitrable questions).
“[A]ny doubts concerning the scope of arbitrable issues should be resolved in favor of
arbitration, whether the problem at hand is the construction of the contract language itself
or an allegation of waiver, delay, or a like defense to arbitrability.” Moses H. Cone Mem. Hosp.,
460 U.S. at 24–25.

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The All Writs Act is a “residual source of authority to issue writs that are not
otherwise covered by statute.” Penn. Bureau of Corr. v. U.S. Marshals Serv., 474 U.S. 34, 43
(1985). Thus, while the Act authorizes a federal court to issue commands that are “necessary
or appropriate to effectuate or prevent the frustration of orders it has previously issued in its
exercise of jurisdiction otherwise obtained,” Sheet Metal Contractors Ass’n of N. N.J. v. Sheet
Metal Workers’ Int’l Ass’n, 157 F.3d 78, 82 (2d Cir. 1998) (internal quotation marks omitted),
the remedies permitted under the Act are “extraordinary” and “should not be used simply to
avoid the inconvenience of following statutory procedures that govern the particular
circumstances,” United States v. Int’l Bhd. of Teamsters, Chauffeurs, Warehousemen and Helpers of
Am., AFL-CIO, 907 F.2d 277, 280 (2d Cir. 1990); see also Chappell & Co. v. Frankel, 367 F.2d
197, 199–200 (2d Cir. 1966) (observing that the “prerogative writs [codified in § 1651(a)]
have been reserved for extraordinary circumstances”). We review de novo a district court’s
interpretation of the All Writs Act, United States v. Schurkman, 728 F.3d 129, 135 (2d Cir.
2013), but will overturn its decision to grant or deny an injunction under the Act only upon
identifying an abuse of discretion, see id.
In American Express, we considered an injunction that barred investors from
arbitrating claims against a financial services company that the investors had previously
released in a federal class action settlement over which the district court retained jurisdiction.
672 F.3d at 118–19. Explaining that the FAA did not “explicitly confer on the judiciary the
authority to . . . enjoin a private arbitration,” we nonetheless concluded that the injunction
was proper in that case because the company, by entering into the settlement agreement, had
effectively withdrawn its consent to arbitrate the released claims and the district court had

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retained “exclusive” jurisdiction to implement the terms of that settlement agreement. See id.
at 140–41 & n.20. In so holding, we “pause[d] to note” that some of our sister circuits had
authorized the use of the All Writs Act to enjoin arbitrations in similar circumstances to
prevent the relitigation of federal judgments. Id. at 141 n.20 (citing cases). We found it
unnecessary to consider whether we agreed with that practice given our conclusion that the
district court’s authority to enter the injunction flowed from its retention of jurisdiction over
the settlement agreement. Id. We thus left unanswered the question of “whether the
dictates of the All Writs Act might, in another case without the type of jurisdictional
retention present [in American Express], give a district court the authority to enjoin arbitration
to prevent re-litigation.” Id. (internal quotation marks omitted).
In this case the district court did not retain jurisdiction over the March 2013
judgment, much less in a manner comparable to the court’s retention of jurisdiction over the
settlement agreement in American Express. Citigroup contends that because American Express
left unresolved whether the All Writs Act permits courts to enjoin an arbitration in the
absence of such “jurisdictional retention,” Judge Castel erred when he concluded, in
Citigroup’s words, that the court “lacked the power to prevent ADIA from frustrating the
[c]ourt’s final judgment” by bringing new claims that were or could have been raised in the
parties’ first arbitration. Citigroup Br. 27. We disagree with that assertion. The FAA’s
policy favoring arbitration and our precedents interpreting that policy indicate that it is the
arbitrators, not the federal courts, who ordinarily should determine the claim-preclusive
effect of a federal judgment that confirms an arbitration award. Citigroup, moreover, has

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failed to demonstrate that the circumstances of this case justify use of the federal courts’
authority codified in the All Writs Act to obtain a different result.
We reason from our prior decisions interpreting the FAA that the determination of
the claim-preclusive effect of a prior federal judgment confirming an arbitration award is to
be left to the arbitrators. In Belco, we held that the claim-preclusive effect of a prior
arbitration award confirmed by a state court judgment was an issue for the arbitrators to
decide rather than the federal court. 88 F.3d at 135–36. In so holding, we reasoned that
claim preclusion was not a question of arbitrability because it, like other affirmative defenses
such as time limits and laches, was a legal defense to the opposing party’s claims and, as
such, was “itself a component of the dispute on the merits.” Id. Several months later, we
held in United States Fire Ins. Co. v. National Gypsum Co. (“National Gypsum”) that the
arbitrators, not the court, were also to decide whether the doctrine of issue preclusion, or
collateral estoppel, barred a party from arbitrating certain issues that had previously been
resolved in litigation resulting in a federal judgment. 101 F.3d 813, 816–17 (2d Cir. 1996).
Noting that Belco involved the preclusive effect of a prior arbitration, we concluded in
National Gypsum that its reasoning was nonetheless equally applicable to the “issue-preclusive
effect of a prior judgment” because issue preclusion is also an affirmative defense that is
“part of the dispute on the merits.” Id. at 817.
Given our holdings in Belco and National Gypsum that arbitrators are to resolve the
claim-preclusive effect of an arbitration award confirmed by a state court and the issue-
preclusive effect of a federal judgment, it is a simple intuitive step to conclude that
arbitrators should also decide the claim-preclusive effect of a federal judgment confirming an

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arbitral award. This is especially so because Citigroup has not challenged the validity of the
arbitration clause at issue in this case and that clause, like the one in Belco, is sufficiently
broad to cover any dispute over whether ADIA’s current claims were or could have been
raised during the first arbitration. Compare Belco, 88 F.3d at 136 (dispute concerning
applicability of claim preclusion sent to arbitrators when the arbitration clause covered “all
disputes which may arise under or in connection with” the underlying contract), with J.A. at
163 (arbitration clause covering “any dispute that arises out of or relates to the [Investment
Agreement], or the breach thereof”). And even if we harbored some doubt as to whether
the claim preclusion dispute in this case is arbitrable, we would resolve that doubt in favor of
arbitration. See Moses H. Cone Mem. Hosp., 460 U.S. at 24–25.
Citigroup argues that this case warrants a different result because it, unlike Belco,
involves the claim-preclusive effect of a prior federal judgment. In support, Citigroup points
to the various decisions we cited in American Express in which other courts have sanctioned
the use of the All Writs Act to enjoin arbitrations that threaten federal judgments. See In re
Y&A Grp., 38 F.3d at 382–83 (holding that the district court had authority under the All
Writs Act to enjoin arbitration to protect its earlier consent judgment where the arbitral
panel had declined to afford that judgment preclusive effect); Hartley v. Stamford Towers Ltd.
P’ship, 1994 WL 463497, at *3–5 (9th Cir. Aug. 26, 1994) (unpublished) (court had authority
pursuant to the Act to enjoin arbitration when its final judgment approving a class action
settlement reserved jurisdiction to enforce the settlement and enjoined class members from
bringing subsequent claims grounded in the same factual basis); Allstate Ins. Co. v. Elzanaty,
929 F. Supp. 2d 199, 219–20 (E.D.N.Y. 2013) (temporarily enjoining arbitration pursuant to

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the Act to protect ongoing litigation in federal court after determining that it “would severely
threaten any judgment of th[e] [c]ourt to have pending arbitrations or future arbitrations
result in inconsistent rulings”); see also John Hancock Mut. Life Ins. Co. v. Olick, 151 F.3d 132,
137–39 (3d Cir. 1998) (holding that the district court, rather than the arbitrators, should have
decided the preclusive effect of the district court’s earlier judgment on the merits). There is,
however one significant difference between the precedent established in the cases to which
Citigroup cites and the circumstances here. The relevant judgments given preclusive effect
via the All Writs Act in those cases followed from federal judicial proceedings addressing the
merits of the underlying claims. Thus, in the cases on which Citigroup relies, the main
justification given for resorting to the All Writs Act is that the district court that resolved the
merits of a case is in the best position to protect its judgment because it is the most familiar
with what it considered and decided in the proceedings leading to that judgment. See, e.g., In
re Y&A Grp. Sec. Litig., 38 F.3d at 382–83 (“The district court, and not the arbitration panel,
is the best interpreter of its own judgment.”).3
We need not, and do not, consider whether we agree with this justification because it
is simply absent from this case. Citigroup seeks to preclude a second arbitration based on
the district court’s March 2013 confirmation judgment because it fears that the second
3 The limited scope of Y&A Group is underscored by the concurring opinion of the late
Judge Richard Arnold, who specifically noted that the final order of the district court
approving the settlement agreement in that case had specifically enjoined class members
from brining further claims, a fact he regarded as “dispositive.” Judge Arnold went on to
note that “[i]n general, when parties agree to submit a matter to arbitration, they contract for
the arbitrator’s decision on legal questions . . . include[ing] defenses, such as res judicata,”
and that he did not read the opinion “to hold general that courts may, by injunction, control
the decision of arbitrators on questions of issue or claim preclusion.” 38 F.3d at 384.

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arbitration will give ADIA an opportunity to relitigate the same underlying substantive
claims that were or could have been raised in the parties’ first arbitration. The district
court’s March 2013 judgment, however, simply confirmed the arbitration award, which
ordinarily is “a summary proceeding that merely makes what is already a final arbitration
award a judgment of the court.” D.H. Blair & Co., Inc. v. Gottdiener, 462 F.3d 95, 110 (2d Cir.
2006) (internal quotation marks omitted); see also 9 U.S.C. §§ 10, 11 (setting forth the limited
statutory grounds under which a district court may vacate or modify an arbitration award);
Willemijn Houdstermaatschappij, BV v. Standard Microsystems Corp., 103 F.3d 9, 12 (2d Cir. 1997)
(“[T]he court’s function in confirming or vacating an arbitration award is severely limited.”
(internal quotation marks omitted)).4 Indeed, in confirming the award, the district court did
not review the merits of any of ADIA’s substantive claims or the context in which those
claims arose. Instead, it considered only whether the arbitration panel’s evidentiary rulings
and application of New York choice-of-law principles violated the FAA. See generally Abu
Dhabi Inv. Auth. v. Citigroup, Inc., No. 12-cv-283, 2013 WL 789642 (S.D.N.Y. Mar. 4, 2013).
Under these circumstances, a district court unfamiliar with the underlying circumstances,
transactions, and claims, is not the best interpreter of what was decided in the arbitration
4 Citigroup itself observed in its memorandum of law in support of its motion to confirm the
award that “[a]rbitration awards are subject to severely limited judicial review” and that,
under the FAA, “a court must confirm an arbitration award unless it concludes that one of
the enumerated grounds for refusing to enforce the award is present.” See Abu Dhabi Inv.
Auth. v. Citigroup Inc., S.D.N.Y. dkt no. 12-cv-283, doc. 28 at 11 (internal quotation marks
omitted).

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proceedings, the result of which it merely confirmed.5 Accord Emp’rs Ins. Co. of Wausau v.
OneBeacon Am. Ins. Co., 744 F.3d 25, 28–29 (1st Cir. 2014) (reasoning that because a federal
judgment confirming an arbitration award “does not address the steps leading to the
decision on the merits,” there is “no reason why that [judgment] should give the federal
court the exclusive power to determine the preclusive effect of the arbitration”); Chiron Corp
v. Ortho Diagnostic Sys., Inc., 207 F.3d 1126, 1133–34 (9th Cir. 2000) (reasoning that the policy
underlying vesting district courts with authority to determine the claim-preclusive effect of
their own judgments “is not served . . . when the district court merely confirmed the
decision issued by another entity, the arbitrator, and was not uniquely qualified to ascertain
[the] scope and preclusive effect” of that decision). Thus, even assuming, as we stated in
American Express, that there “might” be circumstances under which the All Writs Act
authorizes district courts to enjoin arbitration to prevent relitigation of their prior judgments,
this case does not present them. 6
5 We note also that the district judge who denied Citigroup’s request to enjoin the second
arbitration pursuant to the All Writs Act was not the judge who originally confirmed the
result of the first arbitration. Compare Citigroup, Inc. v. Abu Dhabi Inv. Auth., No. 13-cv-6073,
2013 WL 6171315, at *3–5 (S.D.N.Y. Nov. 25, 2013) (Castel, J.), with Abu Dhabi Inv. Auth.,
2013 WL 789642, at *1 (Daniels, J.).
6 Citigroup’s claim preclusion argument is premised only on the resolution of ADIA’s
underlying substantive claims raised in the first arbitration. Citigroup does not argue, in
other words, that we should give preclusive effect to the district court’s determination in its
March 2013 decision that the first arbitration panel’s evidentiary rulings and choice-of-law
decision did not violate the FAA. We express no opinion as to whether the All Writs Act
would authorize the district court to enjoin an arbitration that threatens to undermine the
district court’s resolution of one of those issues.

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One additional consideration supports our conclusion. Were we to agree with
Citigroup that the preclusive effect of federal confirmation judgments should be decided by
the courts, we would effectively create in this circuit a hierarchy of judgments confirming
arbitration awards: the claim-preclusive effect of confirmation judgments issued by state
courts would, pursuant to Belco, always be decided by the arbitrators, while the claim-
preclusive effect of federal confirmation judgments may be decided by the federal courts
pursuant to their authority under the All Writs Act. This seems an anomalous result,
especially because we are required to afford state-court judgments full faith and credit, see 28
U.S.C. § 1738, and are obliged to accord recognition to the preclusive effect of state court
judgments, see Allen v. McCurry, 449 U.S. 90, 95–96 (1980). Citigroup has not explained why
it is an appropriate use of the All Writs Act’s “extraordinary remedies” to treat state and
federal confirmation judgments differently. The better rule, we think, is to treat them the
same and, in line with Belco and National Gypsum, permit the arbitrators to determine the
preclusive effect of both.
In a final sally, Citigroup argues that if we do not permit the use of the All Writs Act
to protect federal judgments confirming arbitration awards, we effectively would be
relegating those judgments to “second-class status” as compared to federal judgments
following from proceedings on the merits. This outcome, it posits, would be violative of the
FAA, which provides that an order confirming an arbitral award “shall have the same force
and effect, in all respects, as, and be subject to all the provisions of law relating to, a
judgment in an action.” 9 U.S.C. § 13. But Citigroup’s argument presents a false choice.
The question before us is not whether federal judgments confirming arbitration awards

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should be given less preclusive “force and effect” than other federal judgments.7 The
relevant question is instead when, if ever, a federal court’s interest in protecting the integrity
of prior federal judgments authorizes it to use the All Writs Act to reserve for itself the
exclusive prerogative to determine the claim-preclusive effect of those judgments. In
answer, we hold only that when the prior federal judgment merely confirmed an arbitration
award through a limited procedure that did not involve consideration of the merits of the
underlying claims, the FAA’s framework favoring the submission of disputes to arbitration
and our precedents in cases addressing comparable issues preclude a district court from
using the All Writs Act to enjoin a subsequent arbitration of claims that one party asserts are
barred by the prior arbitration.
CONCLUSION
For the foregoing reasons, we affirm the judgment of the district court.
7 Indeed, Citigroup has made no effort to demonstrate that an arbitration panel would not
give claim-preclusive effect to the district court’s March 2013 confirmation judgment if
appropriate.

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