CANADA STOCKS — TSX ends lower as bond yields rise, index snaps weekly losing streak

(Updates at market close) By Utkarsh Hathi and Fergal Smith TORONTO, Sept 18 (Reuters) — Canada's main stock index edged lower on Friday, weighed by declines for energy and industrial shares, as long-term borrowing costs increased, but the index still posted a weekly gain. The Toronto Stock Exchange's S&P/TSX Composite Index ended down 69.58 points, or 0.2%, at 35,804.86. For the week, the index was up 0.3%, after four straight weekly declines. "Markets remain on eggshells thanks to rising oil prices and bond yields and we are not out of the woods when it comes to the volatility that typically arises during September and October," said Rick Gardner, chief investment officer at RGA Investments. US Treasury yields rose as investors evaluated the outlook for interest rates following the Federal Reserve's first rate hike in three years on Wednesday. Investors worry that elevated long-term rates could reduce stock market valuations. U.S. crude oil futures gave back some recent gains, settling 1.6% lower at $100.30 a barrel, as markets assessed Saudi supply alongside concerns about a widening Middle East conflict. Earlier this week, Prime Minister Mark Carney announced that Canada will l