Arbitrage Trading Account

9 Months Ended

Sep. 30, 2013

Trading Securities [Abstract]

Arbitrage Trading Account

Arbitrage Trading Account

At September 30, 2013 and December 31, 2012, the carrying value of the arbitrage trading account was $620 million and $329 million, respectively. The primary focus of the trading account is merger arbitrage. Merger arbitrage is the business of investing in the securities of publicly held companies which are the targets in announced tender offers and mergers. Arbitrage investing differs from other types of investing in its focus on transactions and events believed likely to bring about a change in value over a relatively short time period (usually four months or less). The Company believes that this makes arbitrage investments less vulnerable to changes in general financial market conditions.