Monro Muffler Brake (MNRO) shares soared 5.2% in the last trading session to close at $26.91. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 15.2% loss over the past four weeks.While there is no specific news or development that could be attributed to yesterday's price surge, Monro’s focus on store improvements and strategic acquisitions is expected to aid the upcoming results. That's probably what has made investors optimistic ...