THIS is how to play the summer market slowdown By: CNBC.com News August 05, 2015 at 13:12 PM EDT When the summer heats up, the market cools down. August has historically been the worst month of the year for the S&P 500. Here's how to trade it. Read More >> Related Stocks: Barrick Gold Corporation CenterPoint Energy Dominion Resources Goldcorp Google, Inc. Newmont Mining Oracle Corp Sempra Energy Sentinelone Inc Cl A Yahoo