A trader on the floor of the New York Stock Exchange wears a hat embroidered with 15,000 at the end of the trading day on May 7, 2013 in New York City.

A couple weeks ago I received a call from a friend who is a stock broker. During the course of our conversation, this friend asked about Farr, Miller & Washington's investment strategy for the summer.

He wanted to know how we are positioning client portfolios given the various near-term risks and uncertainties. He pointed out that a strategy of "sell in May and go away" has been quite successful in recent years. He also noted that stocks have already posted solid gains ( up 14 percent YTD) in the first half of the year. Would now be a good time to take some chips off the table and lock in gains for the year?