The next President of the United States is... Donald Trump. Will the White House's new resident shake up the stock market? In the short term, it's anyone's guess. However, a study—whose origin I must confess I've misplaced—reveals that in the last 10 U.S. presidential elections, Wall Street has risen 9 times, boasting a median gain of 17% a year later. For now, Trump's victory has sent ripples through global financial markets.