June 25 (Reuters) - Canada's main stock index fell on Monday as investors fretted about a worsening trade dispute between the United States and other major economies.
* At 9:33 a.m. ET (1333 GMT), the Toronto Stock Exchange's S&P/TSX Composite index .GSPTSE was down 86.88 points, or 0.53 percent, at 16,363.26.
* Brent crude oil prices LCOc1 fell as investors prepared for an extra 1 million barrels per day (bpd) in output to hit the markets after OPEC and its partners agreed to raise production. In contrast, U.S. West Texas Intermediate crude futures CLc1 were up slightly, supported by a slight drop in U.S. drilling activity. O/R
* The U.S. Treasury Department is planning to block firms with at least 25 percent Chinese ownership from buying U.S. companies with "industrially significant technology." Ten of the index's 11 major sectors were lower, led by a 0.6 percent fall in energy shares .SPTTEN and 0.5 percent drop in the financial sector .SPTTFS .
* Suncor Energy Inc's SU.TO 3.5 percent decline and TransCanada Corp 's TRP.TO 1 percent fall were top drags on the energy group.
* The Canadian dollar weakened against its U.S. counterpart as trade tensions pressured the equity markets. Production at Syncrude Canada's oil sands facility near Fort McMurray, Alberta is offline at least through July, after a power outage this week, a spokesman said on Friday. On the TSX, 49 issues were higher, while 180 issues declined for a 3.67-to-1 ratio, with 8.16 million shares traded.
* Top percentage gainers on the TSX were shares of Aphria Inc APH.TO , which jumped 2.2 percent and Detour Gold Corp DGC.TO , which rose 1.4 percent.
* Top decliners on the main index were shares of Hudbay Minerals HBM.TO down 3.2 percent and Lundin Mining LUN.TO 2.7 percent.
* The most heavily traded shares by volume were Aurora Cannabis ACB.TO , Neovasc Inc NVCN.TO and Aphria Inc.
* The TSX posted one new 52-week high and one new low.
* Across all Canadian issues there were five new 52-week highs and three new lows, with total volume of 16.56 million shares.