US stocks retreated from a historic run of gains on Monday as President Trump's new tariff threat revived trade war worries in the wait for a Federal Reserve policy decision. The US dollar (DX=F) also lost ground as Wall Street gauges whether recent confidence that Trump has moved to a dealmaking phase is misplaced.

Futures on Wall Street are on the edge after the Dow Jones and the S&P 500 snapped a historic nine-day winning streak, albeit after recovering from the lows of the day. The Dow futures, along with those on the S&P 500 are trading at the flat line,