Shares of US solar companies fell after President Donald Trump called for new rules that would limit access to tax incentives for renewable energy projects that had already been pared back by a $3.4 trillion budget bill.

Solar stocks retreated Tuesday after President Donald Trump issued an executive order on Monday ending subsidies for green energy sources. The Department of Energy released a corresponding report the same day warning of a major spike in blackouts by 2030 due to the retirement of coal-fired plants.

The maker of solar-power components saw its stock downgraded after Trump’s executive order enforcing a phaseout of tax credits.