Fastly, Inc. (FSLY) experienced a significant after-hours plunge, with its stock price dropping by 23.79% during the post-market session on Wednesday.

The sharp decline followed the company's release of its latest quarterly earnings report. Despite reporting adjusted earnings per share of $0.15, which exceeded the IBES estimate of $0.08, and a gross margin of 62.5%, the stock sold off sharply. Market analysis indicates that the actual results or forward guidance likely fell short of the elevated expectations that had been priced into the stock during a strong pre-earnings rally.

In the days leading up to the earnings release, Fastly's stock had experienced extreme volatility with significant gains as funds positioned ahead of the report. The after-hours plunge suggests that even with an earnings beat, the company's performance or outlook did not meet the heightened market expectations that had built up during this pre-report rally.