Nuclear energy stocks jump. NANO Nuclear Energy up 3.2%; Vistra Energy Corp. up 2%; Oklo Inc., NuScale Power, Constellation Energy up more than 1%.

Nano Nuclear Energy said it has contracted with Thermal Engineering International to help with NNE's nuclear microreactor.

The New York company, which specializes in small modular reactors to produce nuclear energy, plans to work with Thermal Engineering to design and fabricate heat exchangers for its microreactor.

Thermal Energy is a supplier of heat-transfer technology to the electric-power-generation industry.