During the dot-com crash, the Nasdaq Composite fell about 78% from its March 2000 peak to its October 2002 low.
The Nasdaq Composite was especially exposed to the collapse because it contained many rapidly growing technology and internet companies. It reached an intraday high of 5,132.52 on March 10, 2000, as investors placed enormous values on businesses with limited profits or established revenue.
After the bubble burst, technology shares declined for roughly two and a half years. The index reached an intraday low of 1,108.49 on October 9, 2002, representing a decline of about 78% from its peak. The fall was not a single-day crash; it was a prolonged bear market.
A common mix-up is confusing the Nasdaq Composite with the Nasdaq-100. The Composite includes all common stocks listed on Nasdaq, while the Nasdaq-100 tracks 100 large non-financial companies listed there. The S&P 500 also fell during this period, but its decline was substantially smaller.