Why do Investors Care?
The pattern in consumer attitude and spending is often the foremost influence on stock and bond markets. For stocks, strong economic growth translates to healthy corporate profits and higher stock prices. For bonds, the focus is whether economic growth goes overboard and leads to inflation. Ideally, the economy walks that fine line between strong growth and excessive (inflationary) growth. This balance was achieved through much of the nineties. For this reason alone, investors in the stock and bond markets enjoyed huge gains during the bull market of the 1990s. Consumer confidence did shift down in tandem with the equity market in 2000 and 2001.

Consumer spending accounts for two-thirds of the economy, so the markets are always dying to know what consumers are up to and how they might behave in the near future. The more confident consumers are about the economy and their own personal finances, the more likely they are to spend. With this in mind, it's easy to see how this index of consumer attitudes gives insight to the direction of the economy. Just note that changes in consumer confidence and retail sales don't move in tandem month by month.