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.

Investing Essentials

Copyright © 2011 Campbell R. Harvey, Professor of Finance, Fuqua School of Business at Duke University

Term of the Day


Order ticket that shows the stock, price, number of shares, type, and account of the order. Origin: Practice of placing the ticket on a metal spike upon execution or cancellation. Spike is also a... Read More

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