How did the 1987 crash affect the sentiment of advisers? Not surprisingly, the genera! level of bullishness fell dramatically. However, Clarke and Statman report that once bullishness adjusted to its new lower level, the reaction of sentiment to changes in the S&P 500 was pretty close to what it had been prior to the crash. Before the crash, an increase of 10 percent in the S&P 500 led to a 7 percent increase in the Bullish Sentiment Index. After the crash, the same 10 percent increase led to a 6.4 percent increase. In chapter 4, I mentioned that behavioral finance does not have all the answers. Clarke and Statman had hypothesized that the crash would make the sentiment more responsive to changes in the S&P 500. But the evidence refuted their hypothesis.