The VIX has a number of interpretations. As a sentiment indicator, a high VIX reading demonstrates investor fear, and a low VIX reading demonstrates investor confidence. Of course, sentiment indicators are often interpreted as inverse of future market action -- the herd is always wrong. Therefore, a high VIX reading is sign of an impending bullish reversal and a low VIX reading is sign of a bearish reversal. The low VIX reading called the downturns in the bear market from 2001-2003, but it completely whiffed on the rally of spring/summer 2003. No indicator is perfect.