Tempur Sealy International, Inc. (TPX) shares soared 6% in the last trading session to close at $66.92. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 13.3% gain over the past four weeks.Tempur Sealy shares surged yesterday as investor confidence grew over progress in its planned $4 billion acquisition of Mattress Firm Inc. On Friday, a U.S. judge in Texas approved the deal, overturning a previous Federal Trade Commission (FTC) ...