NEW YORK, June 3 (Reuters) – The charge higher in U.S. technology ⁠stocks has made broader indexes as reliant as ever on the group — and more vulnerable should those market leaders trip up.

With stunning gains over the past two months, the S&P 500 ⁠technology sector now accounts for more than 39% of the market capitalization of the overall benchmark index, its highest on record and above the level it reached during the ‌2000 Internet bubble.

“If the small number of tech stocks that have been leading this market higher roll over, by definition, the indexes are going to roll over,” said Matthew Maley, chief market strategist at Miller Tabak. “And when…