CANADA STOCKS-TSX falls in broad retreat, resource stocks weigh

TORONTO, May 18 (Reuters) - Canada's benchmark stock index fell in a broad retreat early on Thursday, weighed down by mining and energy shares as prices for gold and oil slipped. The Toronto Stock Exchange's S&P/TSX composite index declined 75.26 points, or 0.49 percent, to 15,198.42 shortly after the open, with six decliners for every advancer. (Reporting by Alastair Sharp Editing by W Simon)