Are U.S. stocks in a bubble? History says no.

The S&P 500’s torrid and top-heavy advance over the past year has convinced some bearish investors that U.S. stocks are in a bubble. But history says otherwise.Since 1974, the S&P 500 has risen 100% of more during the three years that preceded every bubble peak, according to an analysis from a team of analysts at DataTrek. Despite the wild ride that stocks have been on over the past three years, the S&P 500’s performance during this period has been relatively pedestrian.