Shares of Oklo Inc. (OKLO) tumbled 6.25% in intraday trading on Tuesday, as investors appeared jittery ahead of the company's third-quarter earnings report, scheduled for release after market close. The significant drop came despite positive regulatory news for the advanced nuclear technology company.

Earlier in the day, Oklo announced that the U.S. Department of Energy's Idaho Operations Office had approved the Nuclear Safety Design Agreement (NSDA) for its Aurora Fuel Fabrication Facility (A3F) at Idaho National Laboratory. This approval is a crucial step for Oklo's first commercial-scale reactor, Aurora-INL, which was chosen for the DOE's Reactor Pilot Program. The A3F will produce fuel for this reactor, linking fuel fabrication directly to power generation for near-term advanced nuclear deployment.

Despite this positive development, investors seemed more focused on the impending earnings report. Options activity suggested the market was anticipating a 9.5% move in share price post-earnings, indicating high volatility expectations. The stark contrast between the positive regulatory news and the stock's negative performance highlights the significant impact that quarterly financial results can have on investor sentiment, especially for companies in emerging technologies like advanced nuclear energy.