(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% 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 ended up 57.27 points, or 0.3%, at 20,985.37, a record closing high. The S&P 500 and the Nasdaq Composite 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 , which has the largest market capitalization on the TSX, rose 2.9%, while Constellation Software Inc 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 and BCE Inc, 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 advancing 5.9% and Denison Mines Corp jumping 12.8%. (Reporting by Fergal Smith; Additional reporting by Amal S in Bengaluru; Editing by Sandra Maler) Our Standards: The Thomson Reuters Trust Principles.