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Dow futures fall 100 points as oil slide weighs

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U.S. stock index futures indicated a lower open on Friday as low oil prices weighed.

U.S. crude oil futures for March delivery traded 3.5 percent lower below $30 a barrel as of 8:57 a.m. ET. Dow futures were off by about 100 points.

Traders also eyed CPI which showed a 0.3 percent rise ex-food and energy in January. The headline figure was unchanged from the previous month. Year-over-year, the core CPI advanced 2.2 percent, the largest rise since June 2012, Reuters said.

Treasury yields edged higher, with the 2-year yield at 0.75 percent and the 10-year yield at 1.78 percent.

The U.S. dollar held mildly higher against major currencies, with the euro at $1.107 and the yen at 113.00 yen against the greenback.

Earlier, U.S. futures indicated a slightly higher open, before erasing gains.

Cleveland Fed President Loretta Mester said Friday that policy will likely need to remain accommodative "for some time" given slow growth abroad, the strong dollar, more restrictive financial conditions and the hard-hit energy sector, Reuters reported. Mester also said Inflation will remain "lower for longer" than previously thought, although the U.S. economy will "work through" market volatility and soft economic data.

On the earnings front Deere reported mixed quarterly results, beating on earnings per share, but missing on revenue.

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In Asia, Japan's Nikkei closed down 1.42 percent, while the Shanghai Composite in China closed 0.05 percent lower.

In Europe, the pan-European Stoxx 600 Index was down 1 percent on Friday. The European Union is currently holding crunch talks in Brussels that could determine whether the U.K. stays or leaves the 28 country body.

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—CNBC's Patti Domm contributed to this report