Shares in companies tied to nuclear power jumped Friday, helped by President Donald Trump’s rollout of four executive orders that aim to provide a boost to the sector, but there were concerns about whether there could be much of a near-term impact.

(Reuters) -Shares of nuclear power companies surged in premarket trading after a report that U.S. President Donald Trump would sign executive orders as early as Friday to jumpstart the industry. Trump is expected to streamline the regulatory process for new reactor approvals and enhance fuel supply chains,

Shares rose in Asia on Wednesday while oil prices jumped more than 1% following a report that Israel may be planning an attack on Iranian nuclear facilities. U.S. futures were lower. A CNN report cited unnamed intelligence officials saying Israel may be preparing for an attack on Iranian nuclear facilities.

US stocks are set to extend a retreat with traders nervous about rising bond yields as House lawmakers debated tax cuts at the center of the Trump administration’s policy agenda. The dollar also fell.