The markets focus apparently has turned back on Syria late on Friday, just when early in the global day fears of a military strike had eased.

However in the U.S. session, markets were roiled again after remarks from U.S. President Obama and Secretary of State John Kerry.

During a press conference today Secretary John Kerry declared there was “clear” and “compelling” evidence that the government of President Bashar al-Assad had used poison gas against its citizens.

The Obama administration presented a case for a strike on Syria, as the President said he was considering a “limited” attack (no ground troops).

The Dow Jones and the S&P 500 index tumbled and closed out their worst month since May 2012 while U.S Treasury yields rose while Kerry spoke.

The dollar briefly slipped against the yen while the euro, pound and aussie all fell against the dollar. Risk aversion is helping flows to the safer USD and it is set to end the month highe after notching a third straight weekly gain.

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