But retailing shares erased early losses, for the most part, to close higher. Wal-Mart, the world's biggest retailer, added 81 cents or 1.7% to $49.19. The big loser in the sector was electronics chain Best Buy, which trimmed its outlook on signs that consumers were shying away from big-ticket items including TVs and computers. Best Buy shares plunged $11.25 or 37% to $19.55.