TSX suffers lowest close in six weeks as energy, banks fall

By Fergal Smith TORONTO (Reuters) - Canada's benchmark stock index on Friday closed at its lowest in six weeks on declines in energy and banking shares, pressured by lower oil prices and an uncertain U.S. interest rate and political environment. The Toronto Stock Exchange's S&P/TSX composite index closed down 74.17 points, or 0.51 percent, at 14,509.25, while on Wall Street, the S&P 500 ended lower for the ninth straight session, unnerved by a recent tightening in the U.S. presidential e