Oklo Inc. (OKLO), a developer of small modular nuclear reactors, saw its stock plummet 5.02% in pre-market trading on Wednesday, continuing a downward trend observed in the nuclear energy sector. This decline comes as part of a broader sell-off in speculative stocks that have seen substantial gains earlier in the year.

The pre-market plunge follows a 12.33% drop in Oklo's stock price during the previous trading session, highlighting growing investor concerns about the sustainability of recent gains in the nuclear energy sector. Oklo's stock has surged an impressive 557% year-to-date, driven by enthusiasm surrounding the potential for small reactors to meet power demands in the artificial intelligence boom.

Adding to the downward pressure, renowned CNBC TV host and former hedge fund manager Jim Cramer issued a warning to investors about speculative plays in sectors including nuclear energy. Cramer urged investors to consider selling into any "snapback" momentum, cautioning that these stocks are "not going down without a fight." This advice comes amid heightened volatility in sectors that have seen sharp rallies in recent months and have potentially become disconnected from fundamentals.

As the market reassesses the valuations of companies in emerging technologies, Oklo and its peers in the nuclear energy sector face increased scrutiny. Investors are now weighing the long-term potential of small modular reactors against the immediate challenges of profitability and revenue generation in this nascent industry.