                            RECOMMENDED FOR FULL-TEXT PUBLICATION
                                 Pursuant to Sixth Circuit Rule 206
                                        File Name: 05a0456p.06

                     UNITED STATES COURT OF APPEALS
                                    FOR THE SIXTH CIRCUIT
                                      _________________


                                                     X
                               Plaintiff-Appellant, -
 NATIONWIDE MUTUAL INSURANCE COMPANY,
                                                      -
                                                      -
                                                      -
                                                          No. 04-4344
          v.
                                                      ,
                                                       >
 HOME INSURANCE COMPANY,                              -
                              Defendant-Appellee. -
                                                     N
                      Appeal from the United States District Court
                     for the Southern District of Ohio at Columbus.
                 No. 03-00933—Edmund A. Sargus, Jr., District Judge.
                                   Argued: September 13, 2005
                             Decided and Filed: November 29, 2005
                    Before: CLAY, GIBBONS, and GRIFFIN, Circuit Judges.
                                        _________________
                                             COUNSEL
ARGUED: Michael L. Cohen, COHEN & BUCKLEY, Baltimore, Maryland, for Appellant. Philip
J. Loree Jr., CADWALADER, WICKERSHAM & TAFT, New York, New York, for Appellee.
ON BRIEF: Michael L. Cohen, COHEN & BUCKLEY, Baltimore, Maryland, Randolph Carson
Wiseman, Stephen C. Gray, BRICKER & ECKLER, Columbus, Ohio, for Appellant. Philip J. Loree
Jr., Clifford H. Schoenberg, CADWALADER, WICKERSHAM & TAFT, New York, New York,
Gerald P. Ferguson, VORYS, SATER, SEYMOUR & PEASE, Columbus, Ohio, for Appellee.
                                        _________________
                                            OPINION
                                        _________________
         GRIFFIN, Circuit Judge. Plaintiff Nationwide Mutual Insurance Company (“Nationwide”)
appeals a district court order denying its application for vacatur of a final arbitration award issued
in this reinsurance dispute with defendant Home Insurance Company (“Home”). For the reasons
set forth below, we affirm the judgment of the district court confirming the award.
                                                  I.
       This long-running dispute originated in 1995, when Nationwide filed suit against Home for
breach of a reinsurance contract that the parties had originally entered into in 1977. The district
court referred the parties to arbitration pursuant to the terms of an arbitration clause in the
reinsurance agreement. Numerous interim decisions of the arbitration panel were thereafter
challenged in the district court, and, in fact, this is the fourth time this matter has come before the

                                                  1
No. 04-4344                 Nationwide Mutual v. Home Insurance Co.                                               Page 2


Sixth Circuit for review. The extensive procedural history and involvement of this Court is found
at Nationwide Mut. Ins. Co. v. Home Ins. Co., 150 F.3d 545 (6th Cir. 1998) (Nationwide I);
Nationwide Mut. Ins. Co. v. Home Ins. Co., 278 F.3d 621 (6th Cir. 2002) (Nationwide II); and
Nationwide Mut. Ins. Co. v. Home Ins. Co., 330 F.3d 843 (6th Cir. 2003) (Nationwide III). The facts
are succinctly set forth in detail in these prior opinions and will not be reiterated here except to the
extent necessary to dispose of the issues presented on this appeal.
        After this Court’s decision in Nationwide III, the parties proceeded to the third phase of
arbitration, culminating in a merits hearing. On July 17, 2003, the three-member arbitration panel1
rendered its unanimous  final decision which, in pertinent part, awarded Home the sum of $1,250,000
in costs and interest.2
        Nationwide filed suit in district court to vacate the final award and two interim rulings
rendered by the arbitration panel. In the alternative, Nationwide sought vacation of the interim
rulings and Paragraphs 9 and 11 of the final decision granting Home’s request for recovery of its


         1
         This was the second arbitration panel to be appointed in this matter, following the resignation of the initial
panel members. See Nationwide III, 330 F.3d at 844-45.
         2
             The complete text of the panel’s final decision states as follows:
         1. Contract R is a contract of reinsurance.
         2. The Addendum to Contract R, by necessary inference, imposed on Home a duty to supervise
         Rutty’s inward and outward claim handling in respect of Nationwide’s fixed pool share only but not
         a duty to otherwise replace Nationwide in the runoff or to fund Rutty.
         3. In relation to Nationwide’s fixed pool share of inward and outward claims, Home and Rutty agreed
         to deal only with each other. In relation to all other matters, Nationwide retained responsibility to
         supervise Rutty.
         4. Home had a duty to pay accounts within a reasonable time from receipt. In that regard, Home also
         had the right to make reasonable inquiries and conduct reasonable inspections.
         5. In exercising those rights and fulfilling those duties, Home was obligated to act in good faith and
         with fair dealing.
         6. Although many of Home’s queries and inspections were appropriate and legitimate, others were
         excessive and inappropriate. Likewise, many of Home’s claim payments were timely but others were
         not. To the extent that some queries and inspections were excessive, and to the extent that some claim
         payments (including the Excess claim) were untimely, they constituted breaches of duty by Home.
         7. Home’s breaches of duty did not amount to bad faith.
         8. Nationwide has failed in most respects to sustain its burden of demonstrating specific damages
         flowing from specific breaches by Home. The Panel nevertheless believes that some damage
         necessarily resulted from Home’s breaches, and concludes in its discretion that it would be wrong to
         deprive Nationwide of any recovery at all. We accordingly award to Nationwide the sum of $750,000
         in respect of Home’s breaches of duty.
         9. Home is awarded the sum of $1,250,000 in respect of its counterclaims for administrative costs and
         interest.
         10. Nationwide is awarded a contribution from Home of $500,000 toward Nationwide’s costs.
         11. Home is awarded a contribution from Nationwide of $1,250,000 toward Home’s costs.
         12. All other claims and counterclaims between the parties are dismissed.
No. 04-4344              Nationwide Mutual v. Home Insurance Co.                                             Page 3


“fronting share administrative costs” (FSAC) and part of its costs in the arbitration. Home opposed
the vacatur application and sought confirmation of the final order.
       On September 24, 2004, the district court issued an opinion and order denying Nationwide’s
vacatur application, granting Home’s cross-motion for confirmation of the arbitration award, and
entering a final judgment in favor of defendant Home Insurance.
       Nationwide now appeals the district court’s denial of its vacatur application, primarily on
the ground of evident partiality based on an arbitrator’s alleged nondisclosure of certain business
and social relationships with Home.
                                                         II.
        The Federal Arbitration Act (“FAA”) expresses a presumption that arbitration awards will
be confirmed. 9 U.S.C. § 9; Andersons, Inc. v. Horton Farms, Inc., 166 F.3d 308, 328 (6th Cir.
1998). “When courts are called on to review an arbitrator’s decision, the review is very narrow; one
of the narrowest standards of judicial review in all of American jurisprudence.” Nationwide II, 278
F.3d at 625 (quoting Lattimer-Stevens Co. v. United Steelworkers, 913 F.3d 1166, 1169 (6th Cir.
1990)). “[A]s long as the arbitrator is even arguably construing or applying the contract and acting
within the scope of his authority, that a court is convinced he committed serious error does not
suffice to overturn his decision.” United Paperworkers Int’l Union v. Misco, Inc., 484 U.S. 29, 38
(1987). Thus, “[a] federal court may vacate an arbitration award only in very limited
circumstances.” Nationwide III, 330 F.3d at 845. “Those circumstances include ‘where the
arbitrators exceeded their powers,’ 9 U.S.C. § 10(a)(4), and where the arbitrators act with ‘manifest
disregard for the law.’” Id. (quoting Dawahare v. Spencer, 210 F.3d 666, 669 (6th Cir. 2000)). In
addition, an arbitration award may be vacated upon application of any party to the arbitration “where
there was evident partiality or corruption in the arbitrators, or either of them.” 9 U.S.C. § 10(a)(2).
When reviewing a district court’s denial of a motion to vacate an arbitration decision, we accept the
court’s findings of fact, unless clearly erroneous, and consider questions of law de novo.
Nationwide II, 278 F.3d at 625; Dawahare, 210 F.3d at 669.
                                                         III.
                                                         A.
        In the district court, Nationwide sought to vacate the final award of the second arbitration
panel on the ground that the Home-appointed arbitrator, Ronald Jacks, displayed evident partiality
contrary to subsection 10(a)(2) of the FAA, 9 U.S.C. § 10(a)(2). Nationwide also alleged that Jacks
engaged in improper ex parte contacts with one of Home’s attorneys and with employees of
ACE/INA Holdings, Inc., and CIGNA Corporation (“ACE/CIGNA”).3 Specifically, Nationwide
alleged that during the course of arbitration Jacks failed to disclose certain business and social
relationships with Home and its counsel.4 Relying on Apperson v. Fleet Carrier Corp., 879 F.2d
1344, 1358 (6th Cir. 1989), cert. denied 495 U.S. 947 (1990), which held that evident partiality will
be found only where a reasonable person would have to conclude that an arbitrator was partial to



         3
         In 1983, Home sold part of its business, including the reinsurance contract at issue, to CIGNA (now ACE),
which performed its obligations to Nationwide through a subsidiary, AISUK. See Nationwide III, 330 F.3d at 844-45.
         4
          In June 2002, Jacks, one of Home’s attorneys, and their wives had dinner to celebrate a birthday. Jacks also
had contact with one or two ACE employees concerning a recent arbitration in which ACE had appointed him as a
mediator. In June 2002, he also had a very brief conversation, apparently about the weather and politics, with ACE’s
CEO at the School of Risk Management’s annual New York dinner.
No. 04-4344                Nationwide Mutual v. Home Insurance Co.                                                   Page 4


one party to the arbitration, the district court concluded that Nationwide’s claims of evident
partiality were unfounded.
         Nationwide now contends that, in assessing the effects of Jacks’ alleged nondisclosures, the
district court applied the wrong standard. Nationwide urges this Court to limit application of the
Apperson standard to so-called “actual bias” cases, where the evident partiality claim is based on
facts known or disclosed and objected to by the challenging party prior to or during the arbitration.
Citing Commonwealth      Coatings Corp. v. Continental Casualty Co., 393 U.S. 145, 89 S.Ct. 337, 21
L.Ed.2d 301 (1968),5 Nationwide maintains that the fact of the nondisclosure alone mandates
vacatur under either a “reasonable impression of bias” or “appearance of bias” standard. We
disagree.
         In Apperson, this Court, addressing allegations of “evident partiality” in the context of the
arbitration of a labor contract dispute,6 adopted the objective test utilized by the Court of Appeals
for the Second Circuit in Morelite Construction Corp. v. New York City Dist. Council Carpenters
Benefit Funds, 748 F.2d 79, 84 (2d Cir. 1984), in which the Second Circuit held that evident
partiality “will be found where a reasonable    person would have to conclude that an arbitrator was
partial to one party to the arbitration.”7 Id. at 84 (quoted in Apperson, 879 F.2d at 1358). We also
accepted Morelite’s rejection, as dicta, of the appearance of bias standard espoused in the plurality
opinion in Commonwealth Coatings. Apperson, 879 F.2d at 1358 n.19.
         Consequently, “[u]nder Apperson, the party seeking invalidation must demonstrate more than
an amorphous institutional predisposition toward the other side; a lesser showing would be
tantamount to an ‘appearance of bias’ standard.” Andersons, Inc., 166 F.3d at 329. “The alleged
partiality must be direct, definite, and capable of demonstration, and ‘the party asserting [it] . . . must
establish specific facts that indicate improper motives on the part of the arbitrator.’” Id. (quoting
Consolidation Coal Co. v. Local 1643, United Mine Workers of Am., 48 F.3d 125, 129 (4th Cir.
1995)).
        We have since reiterated and followed the Apperson standard in Nationwide II, 278 F.3d at
626; Dawahare, 210 F.3d at 669; and Andersons, Inc., 166 F.3d at 329. We conclude that the
present circumstances do not warrant deviation from Apperson’s case-by-case objective inquiry into


         5
           In Commonwealth Coatings, a divided court addressed the issue of “evident partiality.” A neutral arbitrator
failed to disclose that he had engaged in periodic and significant business relationships with the successful party to the
arbitration, including services related to the subject of the arbitration, and had been paid approximately $12,000 by the
party in consulting fees. 393 U.S. at 146. The Court held that the arbitrator’s failure to disclose this information justified
vacating the arbitration award for evident partiality. Id. at 146-149. In so holding, Justice Black, writing for a plurality
of four justices, indicated that arbitrators, like judges, must avoid even the “appearance of bias.” Id. at 150. Justice
White, joined by Justice Marshall, concurred in the result, but declined to hold that arbitrators are to be held to the
standards of judicial decorum of Article III judges, or indeed of any judges. Id. Justice White opined that “[t]his does
not mean the judiciary must overlook outright chicanery in giving effect to their awards”; however, “it does mean that
arbitrators are not automatically disqualified by a business relationship with the parties before them if both parties are
informed of the relationship in advance, or if they are unaware of the facts but the relationship is trivial.” Id. at 150.
Consequently, a majority of the Court did not endorse the “appearance of bias” standard set forth in the plurality opinion.
See Apperson, 879 F.2d at 1358 n.19.
         6
           Although the FAA exempts labor contracts from its purview, the Apperson Court looked to the FAA for
guidance and utilized the “evident partiality” standard of subsection 10(a)(2) [formerly subsection 10(b)] in reviewing
the bias claims. Apperson, 879 F.2d at 1353 n.9, 1358.
         7
          The Morelite court, “[m]indful of the trade-off between expertise and impartiality, and cognizant of the
voluntary nature of submitting to arbitration,” interpreted evident partiality “as requiring a showing of something more
than the mere ‘appearance of bias’ to vacate an arbitration award,” yet not as insurmountable as “proof of actual bias.”
748 F.2d at 83-84.
No. 04-4344                Nationwide Mutual v. Home Insurance Co.                                                   Page 5


evident partiality, particularly where, as here, the complaint of evident partiality concerns a party-
appointed, as opposed to a neutral, arbitrator. Accord, Sphere Drake Ins. Ltd. v. All Am. Life Ins.
Co., 307 F.3d 617, 620-23 (7th Cir. 2002); Delta Mine Holding Co. v. AFC Coal Prop., Inc., 280
F.3d 815, 821-22 (8th Cir. 2001); Sunkist Soft Drinks, Inc. v. Sunkist Growers, Inc., 10 F.3d 753,
759 (11th Cir. 1993); Merit Ins. Co. v. Leatherby Ins. Co., 714 F.2d 673, 679-80, 683 (7th Cir.
1983).
        The arbitration agreement in this case requires that the arbitrators come from within the
insurance industry and further provides for a tripartite panel consisting of two party-appointed
arbitrators and one neutral umpire. See Nationwide Mut. Co. v. Home Ins. Co., 90 F. Supp. 2d 893,
901-02 (S.D. Ohio 2000). Thus, as the district court noted, the parties clearly agreed to submit their
claims to panel members who are involved in the business of insurance.8 “The most sought-after
arbitrators are those who are prominent and experienced members of the specific business
community in which the dispute to be arbitrated arose. Since they are chosen precisely because of
their involvement in that community, some degree of overlapping representation and interest
inevitably results.” Int’l Produce, Inc. v. A/S Rosshavet, 638 F.2d 548, 552 (2d Cir. 1981).
        Home’s party-appointed arbitrator, Ronald Jacks, who is the focus of the present case, has
extensive experience serving as an international reinsurance arbitrator, a fact noted by the Seventh
Circuit in Sphere Drake, 307 F.3d at 619, when it addressed a claim of evident partiality against
Jacks in another unrelated reinsurance arbitration. The Seventh Circuit overturned the district
court’s finding of evident partiality based on Jacks’ alleged failure to fully disclose that he had acted
as counsel for a subsidiary of a party to the arbitration in an unrelated matter four years earlier. In
so holding, the court held that Jacks’ status as a party-appointed arbitrator on a tripartite panel was
of particular significance:
        Industry arbitration, the modern law merchant, often uses panels composed of
        industry insiders, the better to understand the trade’s norms of doing business and the
        consequences of proposed lines of decision. See Lisa Bernstein, Private Commercial
        Law in the Cotton Industry: Creating Cooperation Through Rules, Norms, and
        Institutions, 99 Mich. L. Rev. 1724, 1728 (2001). The more experience the panel
        has, and the smaller the number of repeat players, the more likely it is that the panel
        will contain some actual or potential friends, counselors, or business rivals of the
        parties. Yet all participants may think the expertise-impartiality tradeoff worthwhile;



        8
            As the Seventh Circuit aptly observed in Merit Insurance Co., 714 F.2d at 679:
        The different weighting of impartiality and expertise in arbitration compared to adjudication is
        dramatically illustrated by the practice whereby each party appoints one of the arbitrators to be his
        representative rather than a genuine umpire. See Note, The Use of Tripartite Boards in Labor,
        Commercial, and International Arbitration, 68 Harv.L.Rev. 293 (1954). No one would dream of
        having a judicial panel composed of one part-time judge and two representatives of the parties, but
        that is the standard arbitration panel, the panel Leatherby chose – presumably because it preferred a
        more expert to a more impartial tribunal – when it wrote an arbitration clause into its reinsurance
        contract with Merit.
        If Leatherby had wanted its dispute with Merit resolved by an Article III judge (to whom it had access
        under the diversity jurisdiction), it would not have inserted an arbitration clause in the contract, or
        having done so move for arbitration against Merit’s wishes. Leatherby wanted something different
        from judicial dispute resolution. It wanted dispute resolution by experts in the insurance industry, who
        were bound to have greater knowledge of the parties, based on previous professional experience, than
        an Article III judge, or a jury. “The parties to an arbitration choose their method of dispute resolution,
        and can ask no more impartiality than inheres in the method they have chosen.” Cf. Am. Almond
        Products Co. v. Consol. Pecan Sales Co., 144 F.2d 448, 451 (2d Cir. 1944) (L. Hand, J.).
No. 04-4344           Nationwide Mutual v. Home Insurance Co.                                   Page 6


        the Arbitration Act does not fasten on every industry the model of the disinterested
        generalist judge.
Id. at 620 (emphasis added).
        The Sphere Drake court, acknowledging these industry practices and the fact that “only
evident partiality, not appearances or risks, spoils an award,” id. at 621, concluded that Jacks’ prior
engagement did not demonstrate evident partiality within the meaning of § 10(a)(2):
        Let us suppose that the district judge’s inferences are sound – that Jacks spent two
        months of equivalent full-time service as counsel for Sphere Drake in an
        international insurance arbitration, four years before the unrelated arbitration with
        All American. Even if Jacks had been the umpire, this would not have implied
        “evident partiality.” Indeed, Jacks could have served as a federal judge in this case
        without challenge on grounds of partiality, and the scope of disqualification under
        § 10(a)(2) is considerably more confined than the rule applicable to judges.
Id.
       The Sphere Drake court further held that, even assuming arguendo that Jacks had not
adequately disclosed the extent of his involvement in the prior, unrelated proceedings, this
nondisclosure alone did not demonstrate evident partiality:
        Commonwealth Coatings did not hold . . . that disclosure is compulsory for its own
        sake, and its absence fatal even if the arbitrator meets judicial standards of
        impartiality . . . . Nor did Commonwealth Coatings so much as hint that party-
        appointed arbitrators are governed by the norms under which neutrals operate. The
        point of Commonwealth Coatings is that the sort of financial entanglements that
        would disqualify a judge will cause problems for a neutral under § 10(a)(2) unless
        disclosure is made and the parties’ consent obtained.
Id. at 623.
         The Seventh Circuit’s well-reasoned decision in Sphere Drake reinforces our conclusion that
we should continue to adhere to the Apperson standard in this case, where evident partiality based
on the alleged nondisclosure of material relationships by a party-appointed arbitrator is claimed.
In formulating the objective standard now used by the Sixth Circuit, the Morelite court, like the
Seventh Circuit in Sphere Drake, was cognizant of the practices and norms peculiar to industry
arbitration and incorporated these considerations in its analysis. 748 F.2d at 83 (“[T]o disqualify
any arbitrator who had professional dealings with one of the parties (to say nothing of a social
acquaintanceship) would make it impossible, in some circumstances, to find a qualified arbitrator
at all.”). The rationale of Sphere Drake, which places an onerous burden of proof on the party
alleging evident partiality of a party-appointed arbitrator, is entirely consistent with the Apperson
standard, which likewise requires proof of circumstances “powerfully suggestive of bias.”
Apperson, 879 F.2d at 1358 (quoting Merit Ins. Co., 714 F.2d at 681).
        Given the arbitration format voluntarily chosen by the parties in this case, to permit vacatur
based upon the mere “appearance of bias” of a party-appointed arbitrator “would be to render this
efficient means of dispute resolution ineffective in many commercial settings.” Morelite, 748 F.2d
No. 04-4344               Nationwide Mutual v. Home Insurance Co.                                                 Page 7


at 84.9 We thus proceed to review Nationwide’s allegations of evident partiality pertaining to
arbitrator Jacks to determine whether a reasonable person would have to conclude that the arbitrator
was partial to one party to the arbitration.
                                                            B.
        During an October 1999 organization meeting with the arbitration panel, the panel members
disclosed their contracts and connections with each other, the parties, and the parties’ attorneys.
Arbitrator Jacks, a retired lawyer, disclosed that he had no prior involvement with Nationwide, but
stated that he had served as Home’s arbitrator on six matters over twenty years, and as opposing
arbitrator twice. Jacks further stated that he had “served on a number of occasions in the last 20
years as a party arbitrator to CIGNA, and with regard to ACE, I represented ACE when . . . I was
actively practicing law.” At the time of the arbitration, Jacks’ law firm was outside general counsel
for ACE, “but I have no continuing involvement in that representation.” He disclosed that he had
been a party arbitrator for his firm’s clients in eighteen arbitrations over a period of more than
twenty years; he was opposing party arbitrator in three or four cases; he served as an umpire in two
cases; and he was currently serving as an expert for one of their clients. Jacks opined at that time
that he would accept future engagements with ACE/CIGNA if he thought it was appropriate.
        Over the next two years, no additional disclosures were made by the arbitrators. In
November 2001, Nationwide’s attorney wrote the arbitrators requesting that each update their
disclosures. Jacks promptly replied, noting his appointment as an arbitrator for ACE in an unrelated
matter. Nationwide did not object to Jacks’ service at the time of the disclosure. Further details of
his involvement were sent by Jacks in January 2002 upon Nationwide’s request. Specifically, Jacks
disclosed that he served approximately twenty times over a twenty-three year period as an arbitrator
appointed by ACE or CIGNA.
        Nationwide took no further action regarding Jacks’ supplemental disclosures until after the
United States District Court for the Northern District of Illinois issued its decision in Sphere Drake,
finding evident partiality on the part of Jacks in an unrelated arbitration. Sphere Drake    Ins. Ltd. v.
All Am. Life Ins. Co., No. 01-C-5226, 2002 WL 1008464 (N.D. Ill. May 17, 2002).10 Nationwide
readily acknowledges that it was prompted by the district court’s decision in Sphere Drake to make
further inquiries in the present case concerning Jacks. In July 2002, Nationwide’s attorney sent
Jacks more detailed questions about his relationship with ACE/CIGNA and the compensation he had
received from them over a twenty-year period. Jacks’ prompt response noted that from 1979 to date
he had participated in over 100 arbitrations between insurers and reinsurers; he had acted as a party-
appointed arbitrator for ACE/CIGNA in twenty cases, three of them still pending; since 1985, he
had served as a party arbitrator for and against Home in six matters; and, while actively practicing
law, he was not a billing partner at his firm for any legal work he did for ACE/CIGNA. Jacks
declined to disclose the amount of total compensation he received from his prior participation in
matters involving Home and ACE/CIGNA. At a September 2002 organizational meeting,
Nationwide agreed to continue with the arbitration under a reservation of rights. Nationwide
subsequently raised the issue of arbitral bias in the district court proceedings below, and also alleged


         9
            Nationwide cites Olson v Merrill Lynch, Pierce, Fenner & Smith, Inc., 51 F.3d 157 (8th Cir. 1995); Schmitz
v. Zilveti, 20 F.3d 1043 (9th Cir. 1994);Middlesex Mut. Ins. Co. v. Levine, 675 F.2d 1197 (11th Cir. 1982); and Positive
Software Inc. v. New Century Mortgage Corp., 337 F. Supp. 2d 868 (N.D. Tex. 2004), for the proposition that the mere
fact of nondisclosure establishes an appearance of bias and, hence, evident partiality. These cases, however, are
inapposite, either involving neutral arbitrators or different governing rules of arbitration, and, to the extent that these
cases endorse an appearance or reasonable impression of bias standard, they conflict with Apperson.
         10
           As previously noted, the Seventh Circuit ultimately reversed the district court’s decision. Sphere Drake, 307
F.3d at 617.
No. 04-4344               Nationwide Mutual v. Home Insurance Co.                                               Page 8


that there were improper ex parte social contacts on the part of Jacks with Home’s counsel and
employees.
        These facts would not, in our opinion, lead a reasonable person to conclude that Jacks was
partial to one side of the arbitration. As the district court noted, this is not even a case of
nondisclosure, as Nationwide argues; rather, Jacks made full and timely disclosures regarding his
business relationship with Home and ACE/CIGNA. These disclosures were not deficient, and
Nationwide otherwise has failed to show with specificity how the substance of these disclosures
pertaining to Jacks’ continued service in the reinsurance industry, and his prior and ongoing contacts
with Home and ACE/CIGNA in numerous unrelated matters, manifest evident partiality pursuant
to 9 U.S.C. § 10(a)(2) and are “powerfully suggestive of bias” in the present matter.
        We likewise agree with the district court that Jacks’ social engagements did not constitute
improper or prohibited ex parte contacts. These events did not involve any communication
regarding the Nationwide-Home arbitration. Certainly, arbitrators and attorneys frequently
participate in activities that result in communication unrelated to the subject matter of litigation
before the arbitrator, Morelite, 748 F.2d at 83, and it would be unreasonable to suggest such contacts
in unrelated matters are prohibited.
         We therefore conclude, on the basis of the above record, that the district court did not clearly
err in denying Nationwide’s application for vacatur based on the allegations of evident partiality on
the part of arbitrator Jacks.
                                                          IV.
       In a related argument, Nationwide contends that it had a contractual right to withdraw its
consent to the second panel’s authority because Jacks’ disclosures rendered him unacceptable to
Nationwide, and, having purported to do so, the second panel acted in excess of its authority
contrary to 9 U.S.C. §10(a)(4) when it rendered the final award. Nationwide’s argument lacks merit.

        First, as the district court properly held, because Jacks’ disclosures were not in fact deficient,
Nationwide’s contention that the second panel somehow exceeded its authority in continuing to hear
the arbitration is baseless. Second, the contractual provision which purportedly legitimizes such
withdrawal in fact merely preserves the right of either party to seek the vacation    of the arbitration
panel’s award except as to fully disclosed and accepted conflicts of interest.11 The provision does
not sanction the unilateral withdrawal of support for the panel that would effectively dismantle the


         11
            Nationwide bases its argument on language found in the Hold Harmless Agreement, whereby both parties
agreed that neither would hold the arbitration panel members liable in connection with their arbitration service. At the
conclusion of the agreement, the following language appears:
         Nothing in this stipulation, however, shall abridge any rights the Petitioner and Respondent may
have with respect to each other to seek the vacation . . . of any . . . Award which the Panel may render
except in regard to any conflicts of interest fully disclosed to the parties at the Organization Meeting, or
thereafter and accepted by the parties.
(J.A. at 471, 473-74, 530.)
          Nationwide alleges that this final exception language, for which it specifically negotiated, gives Nationwide
the right to withdraw upon the subsequent disclosure of any arbitrator conflict for which Nationwide withholds its
approval. Nationwide’s argument is contrary to both the language and the context of the clause. The clause merely
reserves Nationwide’s normal rights to seek vacatur of the arbitration award, while circumscribing those rights somewhat
by disallowing either party to seek vacatur on the grounds of conflict of interest, when such a contention is premised on
a conflict fully disclosed and agreed to by the parties.
No. 04-4344                Nationwide Mutual v. Home Insurance Co.                                           Page 9


ongoing arbitration process. Accordingly, Nationwide could avail itself of no governing contractual
right to withdraw its consent to the second panel’s authority.
                                                         V.
        Finally, Nationwide contends that the second arbitration panel exceeded its authority when
it issued, as part of the final award, “fronting share administrative costs” (“FSAC”) to12Home.
Pursuant to the terms of the underwriting agreements for the participants of the Rutty pool, Rutty
agreed to underwrite risks on behalf of each pool member. The pool members were each responsible
for a percentage of pool liabilities in exchange for the same percentage of pool revenues. The
percentage was fixed annually and was referred to as each pool member’s “fixed quota share.” The
pool members could also act as fronting companies, whereby the cedents and insureds of the pool
would receive contracts issued in the name of one or more pool members but not in the name of all
pool members. Consistent with the terms of the underwriting agreements, however, the actual risks
and premiums were still divided among the pool members based on each pool member’s fixed quota
share. Consequently, because the contracts between the insureds and cedents of the pool and the
issuing companies did not include some pool members, the contingent liability of the fronting
companies to the insured or cedent was almost always higher than their respective fixed quota
shares.
       Nationwide contends that, pursuant to the underwriting agreements, the pool was
administered solely on the basis of each pool member’s fixed quota share; thus, the panel’s award
to Home for its FSAC costs falls outside the ambit of the reinsurance contract.
        Nationwide’s argument is one of arbitrability. As previously noted, the FAA, 9 U.S.C. § 10,
provides for limited judicial review of arbitration awards. The burden of proving that the arbitrators
exceeded their authority is great. Nationwide III, 330 F.3d at 846. If a dispute is even arguably
within the scope of an arbitration clause, the dispute is arbitrable. See United Paperworkers Int’l
Union, 484 U.S. at 38.
        We have previously characterized the arbitration clause in this reinsurance contract as a
“broad” one. Nationwide I, 150 F.3d at 547. Home’s claim for FSAC costs falls squarely within
the scope of this broad clause. The issue of fronted share liability was initially raised before the
arbitration panel by Nationwide, not Home, when Nationwide argued to the panel that Home’s
administrative duty under the reinsurance contract extended to Nationwide’s fronted share. During
the second phase of arbitration, the panel concluded to the contrary and held that Home’s duty
extended only to Nationwide’s fixed pool share liability. Home continued to insure Nationwide’s
fronted liability under a reservation of rights while the issue was pending before the panel. During
the third phase of arbitration, the panel issued a “duty ruling,” incorporated in its final decision, in
which it held that Home owed Nationwide a duty of care, good faith and fair dealing only in
conjunction with the administration of the fixed pool share. The panel thereafter awarded Home the
FSAC costs it incurred in acting on Nationwide’s behalf when it was under no obligation to do so.13
This award was entirely consistent with the duty ruling and certainly was an arbitrable issue that
originated in Nationwide’s claim regarding fronted share costs. The arbitration panel therefore did
not exceed its authority in awarding such costs.



         12
              See Nationwide I, 150 F.3d at 546.
         13
            Home filed counterclaims seeking approximately $1,700,000 for costs incurred in administering Nationwide’s
fronted liability and $370,000 in interest on balances Home advanced on Nationwide’s behalf for payments Home made
to Nationwide’s cedents on contracts Nationwide fronted for the pool.
No. 04-4344          Nationwide Mutual v. Home Insurance Co.                               Page 10


        Nationwide’s argument that vacatur is warranted as to the remaining costs and expenses
awarded to Home by the arbitration panel is similarly without basis in the record. Arbitrators are
not required to explain their decisions. Dawahare, 210 F.3d at 669. In this complex and prolonged
arbitration, we will not second-guess this aspect of the panel’s award absent any compelling
justification to do so.
                                                VI.
        For the foregoing reasons, we affirm the district court’s order denying Nationwide’s vacatur
application, granting Home’s cross-motion for confirmation of the arbitration award, and entering
final judgment in favor of defendant Home Insurance Company.
