S&P 500 is experiencing violent surge often seen at major market tops. One chart analyst is worried

One chart analyst sees echoes of the dot-com bubble in the S&P 500's latest run-up, as the index has had a sharp surge often seen at major market tops.

One chart analyst sees echoes of the dot-com bubble in the S&P 500's latest run-up, as the index has had a sharp surge often seen at major market tops.