CBOE's total put/call ratio includes index options and equity options. It's a popular indicator for market sentiment. A high put/call ratio suggests that the market is overly bearish and stocks might rebound. A low put/call ratio suggests that market exuberance could result in a sharp fall. When the ratio's 10-day average rises over 1.1, a trough might appear. When it falls below 0.8, a peak might appear.
