MGM Resorts International beat fourth-quarter earnings expectations, and said the Super Bowl effect was surprisingly “amazing” for its Las Vegas properties, but the stock continued to suffer from a post-game hangover Wednesday. Chief Executive Bill Hornbuckle said on the post-earnings conference call with analysts that there had been some uncertainty about how much people would spend at MGM’s Las Vegas properties, given that they had to already spend so much to go the game, which was played in Vegas. “We... ...