Pair Trade? UBS Upgrades Costco, Downgrades American Express By: Benzinga via Benzinga October 26, 2015 at 10:43 AM EDT Costco Wholesale Corporation (NASDAQ: COST) shares are up 9 percent year-to-date, while shares of American Express Company (NYSE: ... Read More >> Related Stocks: American Express Costco Wholesale UBS Group Ag ADR