Continuing my mission of offering some of the internal comments that Bernie Schaeffer routes to his analyst team, here's a note on the CBOE Market Volatility Index (VXO)...

"This is the OEX-based volatility index that goes back to before the 1987 crash. I just noticed that on a 14-month RSI basis, the VXO got more overbought at its recent peak (78.49 in Oct 2008) than it did post-1987 crash (77.09 in Oct 1987)."

Chart Courtesy of Thomson Reuters

Note - these links on the Chicago Board Options Exchange's website have more information about the construction of these indexes:

• CBOE Market Volatility Index (VXO)
• S&P 100 (OEX)