The Nasdaq Composite reached a record closing level of 5,048.62 at the peak of the dot-com bubble in March 2000.
The index reached that closing high on March 10, 2000. The Nasdaq was heavily weighted toward technology and internet-related companies, many of which attracted enormous investor enthusiasm despite limited profits or, in some cases, no established revenue model. Its rise became a widely followed measure of the speculative boom.
After the peak, technology shares began a prolonged decline. The Nasdaq Composite lost roughly 78% of its value by October 2002, when it closed near 1,114. The downturn is commonly called the dot-com crash, although the bubble’s inflation and collapse extended across several years rather than one trading session.
The 5,048.62 figure is a closing value, not the index’s intraday high. That distinction matters because financial indexes can briefly trade above a level before ending lower. The Nasdaq eventually exceeded its 2000 closing record in 2015, after a long recovery.