The nuclear energy stock has fallen by almost 50% from its all-time high.Shares of Oklo (OKLO 3.20%) were on shaky ground today, falling 5.4% in early Wednesday trading and were still trading 2.5% lower as of 2:30 p.m. ET on Wednesday. Optimism around the red-hot nuclear energy stock appears to be waning. Or, let's just say, some analysts are being cautious with their price targets after the stock's incredible 370%-plus run-up in 2025 so far. Plutonium could give Oklo an edge over rivalsGoldman Sachs analys ...