Stocks swung between gains and losses and oil hit a one-month high in early Asian trading on Tuesday after President Donald Trump said the U.S. was reinstating its blockade of Iranian shipping in the Gulf and would collect a 20% fee on cargo traversing the Strait of Hormuz. In a volatile start to the session, MSCI’s broadest index of Asia-Pacific shares outside Japan rose 0.4%, led by a 2.2%