S&P 500 Hits Tech-Heavy Milestone Last Seen With Dot-Com Bubble

The high-flying technology sector hit a potentially ominous milestone on Tuesday: It now amounts to more than 25 percent of the S&P 500 Index.

“It’s the first time the sector has made up at least a quarter of the S&P since a one-year period that ran from Thanksgiving 1999 through Thanksgiving 2000,” according to analysts at Bespoke Investment Group. “Notably, the weighting only got above 25 percent for the final four months of the dot-com bubble when share prices were going insane.”