10 U.S. companies that have thrown away money on buybacks By: MarketWatch April 05, 2016 at 05:12 AM EDT Investors need to understand why companies are repurchasing shares, writes Phil van Doorn. Read More >> Related Stocks: AT&T Inc American Express Coca-Cola Company Exxon Mobil Goldman Sachs Group International Business Machines Macy's Oracle Corp Qualcomm, Inc. Standard & Poors 500 Wal-Mart Stores, Inc. Wells Fargo