Sentiment polls and surveys are a quick and easy way to see where money is being placed, or at least 'talked about'. They are often good as contrarian indicators, but when they trend it is not safe to bet against the tide. Polls are quite arbitrary and fickle, notice how politicians use them to leverage their position based on what the people are saying. Markets change direction swiftly and with force, hence sentiment polls often shift on a dime.
Back on September 29 it appeared the stock market[...]