Stay in May?

The investment adage “Sell in May and go away” would mean giving up on U.S. stocks when they are in a “sweet spot,” The S&P 500 Index’s performance in the 12 months after midterm elections showed the benchmark has risen every time since World War II. The average 12-month gain through 2015 was 14.3 percent — more than twice the index’s advance of 6.9 percent from last November’s midterms through Tuesday, according to data compiled by Bloomberg.