Deep Fission Inc's stock plummeted 5.22% during intraday trading on Thursday, according to market data.

The movement followed a period of high volatility that triggered a trading halt earlier in the session. The company made its Nasdaq debut on the same day after completing a significantly scaled-back initial public offering. Deep Fission sold 2.5 million shares at $16 each, the low end of its latest marketed range, to raise $40 million. This was a reduction from its initial plan to sell 6 million shares at a price between $24 and $26 per share.

The stock's debut was marked by sharp price swings. After opening at its IPO price, the share price jumped, triggering a volatility trading pause. The subsequent price decline appears to reflect market reassessment following the initial surge and the details of the downsized offering.