(Adds investor quotes and details throughout, updates prices)
* TSX ends up 57.27 points, or 0.3%, at 20,985.37
* Technology gains 1.1%; industrials end 0.7% higher
* Shopify Inc advances 2.9%
* Denison Mines Corp jumps 12.8%
By Fergal Smith
TORONTO, Oct 18 (Reuters) - Canada's main stock index climbed to a record high on Monday as investors scooped up high-flying technology companies, switching out of more defensive stocks such as utilities and telecommunications.
The Toronto Stock Exchange's S&P/TSX composite index
.GSPTSE ended up 57.27 points, or 0.3%, at 20,985.37, a record closing high.
The S&P 500 .SPX and the Nasdaq Composite .IXIC also closed higher as investors appeared optimistic about the third-quarter earnings season.
There is "a little bit of rotation back to some of the secular growth winners," said Mike Archibald, a portfolio manager at AGF Investments.
"Shopify, Constellation are both having a good day. That's moving the IT (information technology) space, which is the big driver of the market."
Shares of cloud-based commerce platform company Shopify Inc
SHOP.TO , which has the largest market capitalization on the TSX, rose 2.9%, while Constellation Software Inc CSU.TO was up 2.7%.
Information technology ended up 1.1%, while industrials climbed 0.7% and the heavily-weighed financial services group ended up 0.2%.
After snapping a seven-month winning streak in September, the Canadian equity index has gained 4.6% so far this month, aided by strength in commodity prices.
Energy shares gave back some recent gains on Monday, declining 1.2%. Utilities were down 0.2%, while Rogers Communications Inc RCIb.TO and BCE Inc BCE.TO , two of Canada's biggest telecom companies, fell 0.5% and 0.4% respectively.
Some of the Toronto market's biggest gainers were uranium producers, with Cameco Corp CCO.TO advancing 5.9% and Denison Mines Corp DML.TO jumping 12.8%.
(Reporting by Fergal Smith; Additional reporting by Amal S in Bengaluru; Editing by Sandra Maler)
((fergal.smith@thomsonreuters.com; +1 647 480 7446;))