The S&P 500 hit a record closing level of 1527.46, on March 24, 2000, only to lose half its value by Oct. 9, 2002.

This week marks the 25th anniversary of the peak of the dot-com bubble. In retrospect, there were signs that the market’s ...

There are similarities between the market today and 25 years ago as some investors grow nervous, according to Kairong Xiao, a finance professor at Columbia Business School. But if the moment we ...