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Facebook tumbling on revenue hit, AMD popping, Gilead's CEO departs

Let’s check out the Yahoo Finance charts of the day:

Facebook (FB): Shares tumbling here, down around 19%. The social media giant reported a revenue miss last night that surprised investors, and on the call predicted that future expenses would outpace revenue growth. Ouch.

AMD (AMD): Shares surging here, up around 11%. The chipmaker beat on both the top and bottom lines, noting that it saw a rising demand in its PC business.

Gilead Sciences (GILD): Shares are dropping in midday trade, down around 1%, following its earnings release. The biotech company also revealed that CEO John Milligan, and Chairman John Martin would be leaving their positions by the end of the year.

For more on today’s big stock movers check out the Final Round, live at 3:55pm Eastern, right here on Yahoo Finance.