Both companies beat on the top and bottom lines on Thursday evening. Amazon closed the regular session at $235.50 and traded up to roughly $252 after hours, a gain of about 7% at the print and 9% at the peak. Apple closed at $333.43 and traded down to roughly $312, a decline of more than 6%. The divergence had almost nothing to do with the quality of the two beats and almost everything to do with a single input cost that both companies discussed at length: DRAM.