Donald Trump has added new impetus to an old debate about corporate short-termism. The U.S. president took to Twitter on Friday to say that he has asked the Securities and Exchange Commission to study allowing public companies to report earnings every six months, rather than quarterly. BlackRock Chief Executive Larry Fink had already slammed the practice. JPMorgan’s Jamie Dimon and Warren Buffett earlier this year proposed doing away with quarterly guidance, but not quarterly reporting. And former Democratic presidential candidate Hillary Clinton derided “quarterly capitalism” in 2015; her solution focused on lowering the capital-gains tax the longer an investment was