By , NEW YORK (Reuters) - Investors gave their approval on Monday to U.S. President-elect Joe Biden’s pick of former Federal Reserve Chair Janet Yellen to be the next Treasury secretary, touting her experience at the central bank as critical to helping the country weather coronavirus-fueled economic struggles.U.S. stocks added slightly to gains after reports that Yellen, who chaired the Fed from 2014-2018, would become the first woman to lead the Treasury, if she is confirmed.“It’s a very good pick because she has familiarity with the markets and will work well with the Fed, given her long...…By , NEW YORK (Reuters) - Investors gave their approval on Monday to U.S. President-elect Joe Biden’s pick of former Federal Reserve Chair Janet Yellen to be the next Treasury secretary, touting her experience at the central bank as critical to helping the country weather coronavirus-fueled economic struggles.U.S. stocks added slightly to gains after reports that Yellen, who chaired the Fed from 2014-2018, would become the first woman to lead the Treasury, if she is confirmed.“It’s a very good pick because she has familiarity with the markets and will work well with the Fed, given her long...WW…