July 7 (Reuters) - Canada's main stock index retreated on Tuesday, with energy shares leading declines, on worries about the slower pace of an economic rebound after U.S. cases of COVID-19 surged.
* Florida's greater Miami area became the latest U.S. coronavirus hot spot to roll back its reopening, and, for an eighth straight day, Texas registered an all-time high in the number of people hospitalized at any one moment. Oil prices fell amid concerns of lower demand due to surging infections, pushing the energy sector .SPTTEN 1.5% lower. O/R
* At 9:45 a.m. ET (1345 GMT), the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 61.35 points, or 0.39%, at 15,608.32.
* The Canadian dollar weakened against its U.S. counterpart, with the loonie pulling back from a near two-week high hit the day before. Among other individual sectors and stocks, financials .SPTTFS slipped 1.0% and industrials .GSPTTIN 0.2%.
* The materials sector .GSPTTMT , which includes precious and base metals miners and fertilizer companies, added 0.2% after bullion prices fell. GOL/
* On the TSX, 44 issues were higher, while 173 issues declined for a 3.93-to-1 ratio to the downside, with 15.71 million shares traded.
* The largest percentage gainers on the TSX were Shopify Inc SHOP.TO , which jumped 2.2% and First Quantum Minerals Ltd FM.TO , which rose 1.8%.
* Enerplus Corp ERF.TO fell 5.2%, the most on the TSX. The second biggest decliner was Cenovus Energy Inc CVE.TO , down 3.5%.
* The most heavily traded shares by volume were The Toronto-Dominion Bank TD.TO , down 0.8%; St. Augustine Gold and Copper Ltd SAU.TO , up 25.0% and Argonaut Gold inc AR.TO , down 7.5%.
* The TSX posted 1 new 52-week highs and no new lows.
* Across all Canadian issues there were 19 new 52-week highs and no new lows, with total volume of 34.64 million shares.