Ocean Power Technologies Inc OPTT Surges Over 6 as Stock Tests Key Resistance Level John Hancock Preferred Income Fund HPI Holds Steady Near 1606 as Key Support and Resistance Levels Define Potential Path GCI Liberty GLIBK Slides Over 3 Testing Key Support Levels Amid Broad SellOff Tower Semiconductor TSEM Navigating Near Resistance After a Modest Gain Mammoth Energy Services TUSK Slides 47 as Selling Pressure Persists Key Support Levels in Focus