CBOE Volatility Index

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CBOE Volatility Index

A mathematical measure of the implied volatility of options trading on the S&P 500 index. That is, the CBOE Volatility Index attempts to measure the likelihood of option prices to vary unpredictably in the context of a particular pricing model in this case, the Black-Scholes model. A higher number on the index represents greater volatility, while a lower number represents lower volatility. While critics maintain that its usefulness is overstated, the index is considered a leading indicator of option volatility in the wider market. The CBOE Index is operated by the Chicago Board of Options Exchange, and is also known as the VIX.

CBOE Volatility Index

See VIX Index.

Wall Street Words: An A to Z Guide to Investment Terms for Today's Investor by David L. Scott. Copyright © 2003 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. All rights reserved.

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