Hennessy Advisors Inc HNNA Rallies 2 as Volume Picks Up Air T Inc Preferred Securities AIRTP Edges Higher Amid Steady Trading Vishay Intertechnology VSH Experiences Sharp Decline Key Support Levels Under Scrutiny DigitalOcean Plunges 6 Support Levels in Focus as Cloud Sector Headwinds Intensify ASGI Holds Steady Near 2415 Amidst Modest Pullback Despite Strong Support Foundation