OneBeacon Insurance Company filed a motion to vacate an arbitration award in favor of Swiss Re. OneBeacon argued that the award should be vacated because the arbitrators were guilty of misconduct by refusing to permit necessary discovery and hear certain evidence. The dispute between the parties was governed by a Multiple Line Reinsurance Treaty contract which is an excess loss reinsurance contract containing an arbitration clause. The court denied OneBeacon’s motion to vacate and confirmed Swiss Re’s motion to confirm, finding that the arbitration panel acted reasonably in construing the term “occurrence” under the treaty and that the panel’s discovery and evidentiary decisions were within its discretion. OneBeacon American Insurance Co. v. Swiss Reinsurance Am. Corp., Case No. 09-11495 (USDC D. Mass. Dec. 23, 2010).