Share price doesn't even go up.
Coal energy hasn't been cost efficient in over a decade. Natural gas is barely keeping under wind and solar (both of which have been buoyed by the artificially high retail electricity prices produced by the gas cartels). Nuclear doesn't break even for nearly a decade, due to the enormous upfront construction costs.
This isn't a fiscal policy, it is a political strategy. Suck off Trump's inside circle in order to win his endorsement for future government contracts.