Investors think Comcast is a sell today, but they may be wrong about that.Cable internet giant Comcast (CMCSA -6.71%) stock slipped 6% through 11:11 a.m. ET Thursday despite the company reporting better than expected sales and earnings for the first quarter of 2024.Analysts had forecast the communications company would earn only $0.99 per share (non-GAAP, or adjusted) on sales of $29.8 billion in Q1, but Comcast surprised to the upside with $1.04 per share in earnings and sales of $30.1 billion. Yet its sto ...