There are many theories about what can happen to the stock market following a presidential election - although the performance spread is pretty wide.
The highest election year return for the Standard & Poor's 500 Index takes us back as far as 1928, when Herbert Hoover beat Al Smith. The S&P 500 returned 43.6%.
But the heady atmosphere just before the 1929 stock market crash probably had more to do with that high return than Hoover's election-or Smith's loss.
The lowest return in the 80-year period came in 2008, when now-President Barack Obama beat John McCain. The S&P 500 dropped 37%. Once again, the 2008 financial crisis probably had a greater impact on that result than who won or lost the election.
So what is likely to happen four years later, with the economy still struggling to recover and the S&P 500 ahead about 15%?
Let's take a look.