In addition, in order to help provide investors with an indication of expected future volatility in NDX options, the CBOE calculates and disseminates prices for the CBOE Nasdaq Volatility Index (ticker symbol: VXNSM) which is based on the implied volatility of NDX options. VXN is constructed so that, at any given time, it represents the implied volatility of a hypothetical at-the-money NDX option with thirty calendar days to expiration.
In July 2006 CBOE listed Quarterly options on five Exchange Traded Funds (ETFs): QQQ, IWM, DIA, SPY, and XLE. For more information on Quarterly options please visit these links:
News Release Dated July 7, 2006
Contract Specifications for Quarterlys