Arbitrageur, arbitrager is a person whose business is risk arbitrage. Arbitrageurs buy shares in companies which are potential takeover targets, either to force up the price of the shares before the takeover bid, or simply as a position while waiting for the takeover bid to take place. They also sell shares in the company which is expected to make the takeover bid, since one of the consequences of a takeover bid is usually that the price of the target company rises while that of the bidding company falls. Arbitrageurs may then sell the shares in the target company at a profit, either to one of the parties making the takeover bid, or back to the company itself.
Arbitrageur is one who profits from the differences in price when the same, or extremely similar, security, currency, or commodity is traded on two or more markets. The Arbitrageur profits by simultaneously purchasing and selling these securities to take advantage of pricing differentials (spreads) created by market conditions.