Would you shed these S&P superstars? By: CNBC.com News August 20, 2015 at 06:00 AM EDT Eight big-name companies from the S&P 500 are currently trading at or near record highs, but should you sell the rip? Read More >> Related Stocks: American Express Apple Caterpillar Chipotle Mexican Grill Exxon Mobil Facebook Home Depot Intel Corp International Business Machines JPMorgan Chase & Co Netflix Nike Inc Procter & Gamble Starbucks Corp Under Armour Wal-Mart Stores, Inc.