Despite very average economic performance, consumer sentiment remains at extraordinarily low levels. While there are many interesting aspects to this phenomenon, one is of particular relevance to investors. As we show on page 32 of the Guide to the Markets, peaks and troughs in consumer sentiment have, for many years, been powerful contra-indicators of stock market performance over the subsequent 12 months. However, does this relationship still hold, if the reason for weak sentiment is beyond the realm of a rational assessment of broad economic conditions?