MGR Preferred Shares Edge Lower Testing Key Support Levels Amid Yield Environment Anavex Life Sciences AVXL Edges Lower Hovering Near Key Support Guardian Pharmacy Services GRDN Holds Steady as Key Levels Define Trading Range TScan Therapeutics TCRX Rallies 39 as Shares Test Key Resistance Levels Teekay Tankers TNK Slides 3 as Crude Tanker Rates Weigh on Shipping Sector