We saw the first signs of bulls running for cover earlier this week when the results from our weekly market poll showed bullish sentiment dropping to its lowest levels since we began running our survey in early 2012. Now in today's weekly sentiment survey from the American Association of Individual Investors (AAII), we are seeing further signs that when the going gets tough, the bulls get going. In the latest week, bullish sentiment among individual investors dropped from 34.5% down to 29.0%, which is the lowest level of bullish sentiment since 4/25/13. Clearly, the market's weakness over the last several sessions has spooked investors. It's nothing new in this market -- we've seen it every time a sell-off has occurred throughout this entire 100%+ rally.