TORONTO — Canada’s main stock index was down more than 200 points as the price of oil fell below US$90 per barrel. The S&P/TSX composite index was down 205.95 points at 34,272.79. The move came as the July crude oil contract was down US$3.80 at US$87.50 per barrel. In New York, the Dow Jones industrial average was down 224.75 points at 50,561.26. The S&P 500 index was down 65.04 points at 7,340.69, while the Nasdaq composite was down 399.67 poin…