Nov 9 (Reuters) - Canada's main stock index hit a two-month high on Monday after drugmaker Pfizer said its experimental COVID-19 vaccine was more than 90% effective and as hopes of more stimulus under U.S. President-elect Joe Biden also boosted sentiment.

U.S. drugmaker Pfizer and German partner BioNTech SE are the first drugmakers to release successful data from a large-scale clinical trial of a coronavirus vaccine.

The companies said they have so far found no serious safety concerns and expect to seek U.S. authorization this month for emergency use of the vaccine.

* At 9:47 a.m. ET (1447 GMT), the Toronto Stock Exchange's S&P/TSX composite index was up 379.21 points, or 2.33%, at 16,662.04.

* The index is on track to record its highest single-day jump in nearly seven months.

* Cenovus Energy Inc's shares jumped 15% after the oil and gas producer said it will sell its Marten Hills oil assets in northern Alberta to Headwater Exploration Inc for C$100 million ($77.16 million).

* The energy sector climbed 11.9% as U.S. crude prices were up 10.7% a barrel and Brent crude added 9.6%.

* A decliner was the materials sector, which includes precious metals miners, lost 5% as gold futures fell 4%.

* On the TSX, 171 issues were higher, while 50 issues declined for a 3.42-to-1 ratio favoring gainers, with 69.55 million shares traded.

* The largest percentage gainers on the TSX was Aurora Cannabis, which jumped 25.9%, after reporting an improvement in quarterly results.

* Alamos Gold fell 11.8%, the most on the TSX, while the second biggest decliner was Kinross Gold Corp, down 10.2%.

* The TSX posted 22 new 52-week highs and no new low.

* Across all Canadian issues there were 147 new 52-week highs and 10 new lows, with total volume of 129.36 million shares. (Reporting by Shashank Nayar in Bengaluru; Editing by Amy Caren Daniel)