Stocks ended mixed after crude slumped to three-week lows as hopes of an OPEC deal faded. The Dow ended with gains, though, thanks to an earnings-driven increase in Boeing (BA) shares. Comcast (CMCSA) posted a strong earnings report. The cable company added video customers over its recent quarter, rebounding from a loss a year earlier, while NBCUniversal reported a massive jump in revenue tied to Rio Olympics coverage. Garmin (GRMN) rose as quarterly strength in its wearables division helped to offset weakness in sales of its car GPS devices. Overall revenue rose just over 6%. Verizon's (VZ) multibillion-dollar deal to acquire Yahoo! (YHOO) is still going forward, according to a Verizon exec. The acquisition was called into question after a massive security breach that affected 500 million accounts.
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