Before the Bell: Futures waver as debt talks dominate

Equities Wall Street futures were narrowly mixed early Tuesday after talks to raise the U.S. debt ceiling were described as productive but failed to yield an agreement. Major European markets were mostly lower. TSX futures were down slightly as traders await results from Canada's biggest banks later in the week. In the early premarket period, Dow, S&P and Nasdaq futures were all wavering around break even. On Monday, the S&P 500 and Nasdaq both ended higher but the Dow finished down 0.42 per cent. Canada's S&P/TSX Composite Index was closed on Monday for the Victoria Day holiday. Markets continue to…