Nuclear and other clean energy stocks saw significant gains on Friday following the Biden administration's announcement that portions of nuclear power plants would be eligible for tax credits to support clean hydrogen production.

Shares of Oklo, NuScale Power and Nano Nuclear Energy rose Friday after the Treasury Department and Internal Revenue Service revised rules for hydrogen production tax credits. The three companies all are working on small modular nuclear reactors. Oklo was up 25%, to $27.25, while NuScale gained 17%, to $20.69. Nano rose 13%, to $26.97.