Chesapeake Shares Slump Following RBC's Downgrade To Underperform By: Benzinga via Benzinga June 09, 2016 at 15:23 PM EDT Shares of Chesapeake Energy Corporation (NYSE: CHK) fell more than 5 percent after RBC downgraded the stock to Underperform from Sector ... Read More >> Related Stocks: Chesapeake Energy RBC Bearings Inc