Which U.S. technology index lost about 78% from its March 2000 peak during the dot-com crash?

The Nasdaq Composite lost about 78% from its March 2000 peak during the dot-com crash.

The index reached an intraday high of 5,132.52 on March 10, 2000, after years of enthusiasm for internet and technology companies. Many firms had little revenue or no profits, yet investors assigned them extraordinary valuations based on expectations of rapid online growth.

The bubble began unwinding in 2000, and the Nasdaq continued falling until October 2002, when it closed at 1,114.11. The decline erased trillions of dollars in market value and contributed to a recession in the United States, although the damage varied sharply between companies.

The Nasdaq did not lose exactly 78% in one day. The figure describes its cumulative fall from the 2000 peak to the 2002 trough. The Dow and S&P 500 also declined, but they were less concentrated in technology shares.