NuScale Energy, the only U.S. company with an approved small modular reactor design, lacks an official customer and is unprofitable. The stock, once up 200%, plummeted 75% to $14. NuScale reported a $532 million loss and has yet to secure a major deal, causing concern over share dilution. It’s a risky investment.

Read more at Yahoo Finance: Why NuScale Power Stock Is Plummeting in December