Treasury Secretary Steven Mnuchin said he does not plan to extend several key emergency lending programs beyond the end of the year and asked the Federal Reserve to return the money supporting them, a decision that could hinder President-elect Joseph R. Biden Jr.’s ability to use the central bank’s vast powers to cushion the economic fallout from the virus.
Mr. Mnuchin on Thursday said he would not continue Fed programs, including ones that support the markets for corporate bonds and municipal debt and one that extends loans to midsize businesses. The emergency efforts expire at the end of 2020, but investors