Western Digital (WDC) guides on its FQ3 earnings call for FQ4 revenue of $4.2B-$4.4B and EPS of $2.35-$2.55. That's above a consensus of $4.19B and $2.30, but isn't enough to satisfy investors given today's massive beat and a 70%+ rally from WDC's November lows. WDC -8.1% AH. Falling in sympathy: STX -4.6%. QTM -2.1%. XRTX -2.4%.