Oklo's shares surge 101% over the past year, with Cramer calling it a speculative stock.

Oklo Inc. (NYSE:OKLO) is a nuclear fission power plant developer whose stock has surged 101% over the past year and 63% since Jim Cramer discussed it in February. Cramer initially called it a speculative stock, citing unclear timelines for project deliveries and potential losses. Despite this, the stock has dropped 65% since mid-October.