Nov 11 (Reuters) - Canada's main stock index fell on Monday after rallying for six days, dragged by energy companies tracking lower oil prices, while investors stayed cautious on renewed uncertainty over a trade deal between Washington and Beijing.
* At 09:45 a.m. ET (14:45 GMT), the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 39.39 points, or 0.23%, at 16,838.03.
* Nine of the index's 11 major sectors were fell, led by the energy sector .SPTTEN which dropped 1.2% as U.S. crude CLc1 prices fell 1.5% a barrel, while Brent crude LCOc1 lost 1.1%. O/R
* The financials sector .SPTTFS slipped 0.3%, while the industrials sector .GSPTTIN fell 0.2%.
* The materials sector .GSPTTMT , which includes precious and base metals miners, lost 0.2% even though gold futures GCc1 remained unchanged at $1,461 an ounce. GOL/
* Open Text Corp OTEX.TO rose nearly 2% after the company agreed to buy cloud security company Carbonite Inc CARB.O for nearly $800 million in cash. On the TSX, 87 issues were higher, while 139 issues declined for a 1.60-to-1 ratio to the downside, with 9.26 million shares traded.
* The largest percentage gainers on the TSX were Turquoise Hill Resources Ltd TRQ.TO and Ballard Power Systems Inc BLDP.TO .
* Premium Brands Holding Corp PBH.TO fell 7.6%, the most on the TSX, while the second-biggest decliner was Semafo Inc SMF.TO .
* The most heavily traded shares by volume were Katanga Mining Ltd KAT.TO , Aurora Cannabis ACB.TO and Beta Pro Natural Gas HNU.TO .
* The TSX posted five new 52-week highs and one new low.
* Across all Canadian issues there were 25 new 52-week highs and 12 new lows, with total volume of 18.51 million shares.