Futures gain after rally, indexes set for strong week

U.S. stock index futures climbed on Friday, adding to a sharp rally in the previous session that returned the S&P 500 and Nasdaq to positive territory for the year and putting major indexes on track to break a three-week streak of declines. Thursday's advance came after the European Central Bank detailed a bond-buying program to boost the region's sagging economy and fight deflation.

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Futures gain after rally, indexes set for strong week