Traders work on the floor of the New York Stock Exchange (NYSE) on May 23, 2013 in New York City.
Traders work on the floor of the New York Stock Exchange (NYSE) on May 23, 2013 in New York City. - 

With less than four days of trading left in May, investors are not singing the old Wall Street adage "sell in May, then go away."

Juli Niemann, analyst at Smith Moore & Company, joins Marketplace Morning Report host David Brancaccio to explain.