Book excerpt: Have you ever used a stochastic oscillator? Does your portfolio have spiders in it? Do you really know what a derivative is? From the creators of one of today’s most popular investing Web sites, The Investopedia Guide to Wall Speak presents in-depth definitions of the site’s most searched terms. Covering everything from the basics, such as asset, commodity, and index, to more advanced concepts like tranche, ebenture, and value investing, The Investopedia Guide to Wall Speak takes you beyond the average dictionary definition with concise yet thorough encyclopedic explanations of terms and concepts. It also has about 50 hilarious cartoons—proving that the investing world does have its lighter side. Keep The Investopedia Guide to Wall Speak on hand for those key moments that can make or break an investment, like knowing when to straddle an option . . . and when to strangle it.