(Updates prices, sectors) July 2 (Reuters) - Canada’s main stock index rose on Friday, boosted by energy and mining stocks, as investors looked past dismal economic data including a surprise trade deficit and a slowdown in domestic factory activity. * The energy sector climbed 0.6%, while the materials sector, which includes precious and base metals miners and fertilizer companies, added 0.7% as gold futures rose 0.6% to $1,786 an ounce. * At 9:38 a.m. ET (13:38 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 116.53 points, or 0.58%, at 20,282.11, after hitting a record high at market open. * The nation posted a surprise trade deficit of C$1.39 billion ($1.12 billion) in May, missing analysts’ expectations of a small surplus. * Meanwhile, official data showed the country’s factory activity grew at the slowest pace in four months in June as material shortages persisted and inflation pressures rose. * The financials sector gained 0.4%, while the industrials sector rose 0.2%. * On the TSX, 170 issues were higher, while 56 issues declined in a 3.04-to-1 ratio favoring gainers, with 16.06 million shares traded. * The largest percentage gainers on the TSX were uranium company Nexgen Energy Ltd, which jumped 4.7%, and Mullen Group Ltd that rose 4.3% after the freight transportation provider announced the acquisition of R.S. Harris Transport Ltd. * Capstone Mining Corp fell 2.2%, the most on the TSX, and the second biggest decliner was pot producer Aurora Cannabis Inc, down 1.8%. * The most heavily traded shares by volume were Bombardier Inc, Bank of Nova Scotia, and Goldgroup Mining Inc. * The TSX posted 14 new 52-week highs and no new low. * Across Canadian issues, there were 105 new 52-week highs and 12 new lows, with total volume of 36.46 million shares. (Reporting by Amal S in Bengaluru; Editing by Vinay Dwivedi) Our Standards: The Thomson Reuters Trust Principles.