One of the reasons the U.S. stock market’s sell-off in recent weeks has “so far been orderly,” with the epicenter remaining within tech, may be because of faith that the Fed can protect Wall Street, according to strategists at Barclays. If conditions were to deteriorate quickly, the Fed could cut rates to support the economy.

Wall Street thought the stock market would act as a check on the president. It's not panning out.

At the opening bell, the S P 500 fell 54.92 points, or 0.97%, to 5,620.20, Dow Jones Industrial Average lost 206.06 points, or 0.49%, to 41,635.57, and the Nasdaq Composite decreased 295.45 points, or 1.