TORONTO - North American stock indexes finished the day with minor losses Wednesday, after another seesawing, high-volume trading amid easing volatility and slumping oil prices. The Toronto Stock Exchange's S&P/TSX composite index was down 33.35 points, or 0.22 per cent, to 15,330.58 ? about the same amount it rose at the opening of markets ? with the influential energy and materials sectors leading decliners. In New York, the Dow Jones industrial ...