May 13 (Reuters) - Canada's main stock index fell on Wednesday, weighed down by the energy sector and U.S. Federal Reserve Chairman Jerome Powell's warning of a prolonged economic downturn due to the coronavirus outbreak.
* At 9:50 a.m. ET (1350 GMT), the Toronto Stock Exchange's S&P/TSX composite index was down 93.62 points, or 0.63%, at 14,787.54.
* The energy sector dropped 3% as U.S. crude prices were down 0.2% a barrel, while Brent crude lost 0.5%.
* The financials sector slipped 1.2%, while the industrials sector fell 1.0%.
* The materials sector, which includes precious and base metals miners and fertilizer companies, added 1.0% as gold futures rose 0.7% to $1,717 an ounce.
* On the TSX, 56 issues were higher, while 172 issues declined for a 3.07-to-1 ratio to the downside, with 31.92 million shares traded.
* The largest percentage gainer on the TSX was mining company SEMAFO Inc, which jumped 5.5%, followed by Endeavour Mining Corp, which rose 5.1%. They gained after reporting quarterly results.
* Intertape Polymer Group Inc fell 14.7%, the most on the TSX, after the company forecast second-quarter revenue below analysts' estimates.
* The second-biggest decliner was Air Canada, down 6.0%, on reports of Canada and the United States likely to extend a ban on non-essential travel until June 21 amid the ongoing novel coronavirus pandemic.
* The most heavily traded shares by volume were Freegold Ventures Ltd StageZero Life Sciences Inc and Les Ressources Yorbeau Inc.
* The TSX posted a new 52-week high and a new low.
* Across all Canadian issues, there were four new 52-week highs and four new lows, with total volume of 62.03 million shares. (Reporting by Amal S in Bengaluru; Editing by Maju Samuel)