This is what you need to  know before the bell:

1. European stocks are expected to open modestly lower Friday as global markets react to another missile launch from North Korea over Japan just days after the United Nations agreed tougher sanctions on Pyongyang.

2. The U.S. dollar index, which measures the greenback against a basket of six global currencies, slipped 0.1% to 92.09 even as Treasury bond yield rose yesterday following faster-than-expected inflation data that added to speculation that the Federal Reserve could raise interest rates at least one more time before the end of the year.

3. Global oil prices retreated overnight and into the early portion of European trading, with West Texas Intermediate crude slipping 18 cents to around $49.71 from Thursday's New York close after topping $50 for the first time in five weeks. Brent contracts for November, the global benchmark, were seen 0.36% lower at $55.27 but still look set to book their third consecutive weekly gain.

4. Early indications from U.S. equity futures suggest a mixed open on Wall Street, with the Dow Jones Industrial Average priced to edge just a few points higher while the broader S&P 500 and tech-focused Nasdaq slip marginally into the red.

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