On the markets at midafternoon (ET):In Toronto, the S&P/TSX composite index was down 11.05 points to 15,040.98.The Dow Jones industrial average was up 31.91 points to 21,840.31.The Standard & Poor’s 500 index was up 0.28 of a point to 2,444.52.The Nasdaq composite index was up 11.16 points to 6,294.17.The Canadian dollar was trading at 79.74 cents US, up from Monday’s average price of 80.12 cents US.