This is what you need to know before the bell:
1. European stocks fell sharply for the second consecutive session Friday, while Wall Street futures lurched lower, as investors retreat from global stocks amid rapidly increasing concern that the current crisis in North Korea could escalate into military action.
2. The CBOE volatility index extends advance after Thursday's spike while the 'Fear Gauge' is now at its highest point since the November election.
3. One of the hottest stocks on the planet is likely to be knocked down a peg. Nvidia Corp.'s (NVDA) record second-quarter revenue and an earnings beat did not impress Wall Street.
4. Snap (SNAP) shares are crashing 13% in pre-market trading Friday following a disastrous quarter.
5. U.S. stock futures were lower again on Friday, Aug. 11, as international tensions continued to spike. This will mark Wall Street's fourth day in a row and the Dow Jones Industrial Average's further retreat from a record-making stretch at the beginning of the week that extended nine days.
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