Arbitrage is a usual transaction behavior in order to make profits. It is the possibility of riskless profits.

套利是一种常见的，以获利为目的的交易行为，它是基于无风险的超额利润产生的。

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Arbitrage is a usual transaction behavior in order to make profits. It is the possibilitity of riskless profits.

套利是一种常见的，以获利为目的的交易行为，它是基于无风险的超额利润产生的。

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Spitzer claims there is a smoking e-mail: memos between two midlevel managers at General Re suggesting the company's former chief executive, Ronald Ferguson, and Greenberg knew it was a riskless transaction.

FORBES: The Battle of the Titans over AIG