The U.S. Supreme Court, in a ruling that may mean new limits on class-action suits, rejected an effort to sue Wal-Mart Stores Inc. for discrimination on behalf of potentially a million female workers. The justices said the lawyers pressing the case failed to point to a common corporate policy that led to gender discrimination against workers at thousands of Wal-Mart and Sam's Club stores across the country...Units of Cigna Corp., Goldman Sachs Group Inc., Bayer AG, Toshiba Corp., Publicis Group SA, Deere & Co. and Costco Wholesale Corp. all face gender discrimination complaints that seek class action status. More than 20 companies supported Wal- Mart at the Supreme Court, including Intel Corp., Altria Group Inc., Bank of America Corp., Microsoft Corp. and General Electric Co.