SibanyeStillwater SBSW Slips 193 as Traders Eye Key Support Near 1133 Polaryx Therapeutics PLYX Retreats Toward Support Amid Selling Pressure Stifel Financial Holds Steady Near 7259 as Traders Eye Narrow Trading Range GCI Liberty GLIBK Rallies 179 Approaching Resistance at 2445 Grid Dynamics Holdings GDYN Edges Higher Near Resistance Level