The weekend Trump’s tariff threats became real for global investors

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Last week, said the head of trading at one brokerage in Tokyo, markets were unsure what they were seeing. Was Donald Trump serious about tariffs or was it brinkmanship? Would there be a sudden rash of deals that made it all go away? Was this the end of the global trading system? 

“Then over the weekend, when you saw China retaliating on tariffs, Trump digging in with…