Which U.S. technology index fell 78% during the dot-com crash?

The Nasdaq Composite fell about 78% during the dot-com crash.

The index reached a record closing high of 5,048.62 on March 10, 2000, at the height of the technology-stock bubble. It then declined as investors reassessed companies whose prices were based more on expected internet growth than on established profits.

The Nasdaq Composite includes thousands of common equities listed on the Nasdaq exchange, with a strong representation from technology companies. Its 78% decline is therefore often used as a headline measure of the dot-com collapse. The Nasdaq was not itself a company or a single technology stock, and the index later recovered and reached new records.