Arbitrage: The simultaneous buying and selling of a security at two different prices in two different markets, resulting in profits without risk. Perfectly efficient markets present no arbitrage opportunities. Perfectly efficient markets seldom exist, but, arbitrage opportunities are often precluded because of transactions costs.

 

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Arbitrage: Arbitrage is the technique of simultaneously buying at a lower price in one market and selling at a higher price in another market to make a profit on the spread between the prices. Although . . . View Full Definition

Arbitrageur: 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 simultaneousl . . . View Full Definition

Risk Arbitrage: Traditionally, the simultaneous purchase of stock in a company being acquired and the sale of stock of the acquirer. Modern risk arbitrage focuses on capturing the spreads between the market . . . View Full Definition

Arbitrage Pricing Theory (APT): An alternative model to the capital asset pricing model developed by Stephen Ross and based purely on arbitrage arguments. The APT implies that there are multiple risk factors that need to b . . . View Full Definition