Why Did NuScale Power Stock (SMR) Plummet Today?

This volatile stock is falling after a big gain.Shares of NuScale Power (SMR -10.50%) fell Thursday, finishing the day down 10.5%. The retreat came as the S&P 500 (^GSPC 0.83%) and the Nasdaq Composite (^IXIC 0.98%) gained 0.8% and 1%, respectively.The small modular reactor (SMR) developer is giving back some of yesterday's gains, which followed news that the Tennessee Valley Authority (TVA) signed an agreement to develop a massive 6-gigawatt nuclear project using NuScale's technology.NuScale lands a massiv ...