* TSX down 41.12 points, 0.27 percent, at 14,997.29
* Seven of 10 main index sectors advance
* Energy shares drop 4.8 percent
By John Tilak
TORONTO, Nov 27 (Reuters) - Canada's main stock index fell on Thursday as the outcome of an Organization of the Petroleum Exporting Countries meeting hit oil prices, weighing on shares of energy producers and offsetting gains in most of the sectors.
The OPEC meeting was the market's focus as it came after months of depressed oil prices, which have been weighed by concerns about increasing supply and sluggish demand for the commodity. The cartel did not announce the output cut investors were hoping for. Oil prices tumbled to a four-year low.
Energy shares, which are down about 29 percent since the middle of June, slumped 4.8 percent on Thursday.
"Energy shares are still vulnerable. I don't think they've shown signs of bottoming yet," said John Ing, president of Maison Placements Canada.
"This is going to drag on," he added. "The industry was hoping for higher oil prices, but it looks like prices are going to remain under pressure."
Overall, trading volumes were light because of the U.S. Thanksgiving holiday.
The Toronto Stock Exchange's S&P/TSX composite index was down 41.12 points, or 0.27 percent, at 14,997.29. Seven of the 10 main sectors on the index were higher.
Among shares of energy producers, Suncor Energy Inc gave back 5.6 percent to C$36.89 and had the biggest negative influence on the market. Canadian Natural Resources Ltd lost 3.5 percent to C$39.95.
Financials, the index's most heavily weighted sector, advanced 0.4 percent. Royal Bank of Canada climbed 0.5 percent to C$83.16, and Bank of Montreal rose 0.4 percent to C$83.96. (Editing by Nick Zieminski)