President Trump’s announcement last week that his administration would levy import tariffs on steel and aluminum to protect those industries in the U.S. has stoked wide-ranging fears. His plan is to impose import duties of 25% on steel and 10% on aluminum. The Dow Jones and the S&P indices reacted strongly, shedding 3% and 2%, respectively, over four successive trading days, before recovering somewhat on Monday. Trump’s tariff plan is flawed on several fronts, according to experts at Wharton and Fordham University. Trump’s objective to protect the fortunes of U.S. steel and aluminum makers will end up raising prices for those products and hurt all sectors that use them, notably the automobile and energy industries. That, in turn, will depress the stock markets, whose upward climb he has taken credit for, said Wharton finance professor Jeremy Siegel . The Trump tariff plan would also run afoul of international trade agreements and U.S.…