Should you invest in industries with the highest sales growth projections?

While aggressive corporate cost cutting is helping keep bottom lines from shrinking as fast as they otherwise might, the real problem for investors is the even bigger plunge in the sales of their top lines. Yet if a Goldman Sachs Group (GS) analyis is correct, there are three industries which should enjoy a boost in revenues. So, it might be worth looking at stocks in those industries.

Before getting into those three sectors, it is worth noting that most companies have been beating Wall Street earnings expectations this year, which could help explain the rise in the stock market. The New York Times reports that almost 75 percent of S&P 500 companies have already announced quarterly results that beat analysts' forecasts. In the first quarter of 2009, roughly 66 percent of the S&P 500 exceeded those expectations.