Let’s first start with some definitions:
VIX9D: The CBOE S&P 500 9-Day Volatility Index estimates the expected 9-day volatility of S&P 500® stock returns.
www.cboe.com
VIX: The CBOE Volatility Index® (VIX® ) is considered by many to be the world's premier barometer of equity market volatility. The VIX Index is based on real-time prices of options on the S&P...
