Credo Technology Group Holding Ltd experienced a significant 24-hour plunge of 5.63% during extended hours trading, reflecting broad pressure on semiconductor stocks.

The decline was driven by weakness across the semiconductor sector, with the Philadelphia Semiconductor Index falling nearly 2% and dragging down key peers including Marvell Technology, Intel, Micron Technology, and Advanced Micro Devices.

Additionally, ongoing insider selling by CFO Daniel Fleming, who has been executing a plan to sell 60,000 shares with 41,868 shares already sold between June 10 and 11, continued to weigh on market sentiment. The stock had previously surged following positive analyst coverage, creating short-term profit-taking pressure that contributed to the downward movement.