Reversing a federal appeals court decision certifying a massive sex discrimination class action against Wal-Mart Stores Inc., a divided U.S. Supreme Court June 20 ruled that the female plaintiffs failed to satisfy the requirements of Rule 23(a) of the Federal Rules of Civil Procedure to show common questions of law or fact affecting the proposed class (Wal-Mart Stores Inc. v. Dukes).

Writing for five members of the court, Justice Antonin Scalia said the U.S. Court of Appeals for the Ninth Circuit erred in finding that the plaintiffs, who allege Wal-Mart violates Title VII of the 1964 Civil Rights...