Feb 28 (Reuters) - Canada's main stock index declined on Thursday, led by losses in the heavy-weight financial sector on the back of disappointing quarterly earnings from Toronto-Dominion Bank TD.TO .
* Canada's second-biggest lender TD.TO fell 2.8 percent after reporting lower-than-expected rise in earnings, hurt by losses at its wholesale banking business. The heavy-weight financial group of stocks .SPTTFS fell 0.73 percent, the most among the 4 major sectors trading lower.
* Canadian Imperial Bank of Commerce CM.TO fell 1.2 percent after the country's fifth biggest-lender reported a bigger-than-expected decline in quarterly earnings. At 9:44 a.m. ET (14:44 GMT), the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 29.38 points, or 0.18 percent, at 16,044.92.
* Also weighing on sentiment was an abrupt end to the U.S.-North Korean summit in Vietnam as U.S. President Donald Trump walked away from a nuclear deal with Kim Jong Un because of unacceptable demands from the North Korean leader to lift U.S.-led sanctions. In a bright spot, Canopy Growth WEED.TO gained 2.8 percent after the company roped in lifestyle guru Martha Stewart as an adviser to help develop a line of new pot-based products for both humans and animals. Air Canada AC.TO rose 1.6 percent after increasing its long-term targets for profit margins and free cash flow. On the TSX, 101 issues were higher, while 120 issues declined for a 1.19-to-1 ratio to the downside, with traded volume touching 20.53 million shares.
* The largest percentage gainer on the TSX was AltaGas Ltd ALA.TO , which jumped 4.4 percent, after its quarterly results beat analysts' estimates.
** This was followed by Tricon Capital Group Inc TCN.TO , which rose 4 percent after fourth-quarter results.
* Cascades Inc CAS.TO fell 8.5 percent, the most on the TSX, while the second biggest decliner was Maple Leaf Food MFI.TO , down 3.8 percent. Both companies reported quarterly profit that missed expectations
* The most heavily traded shares by volume were Encana Corp ECA.TO , Aurora Cannabis ACB.TO and Nemaska Lithium NMX.TO .
* The TSX posted five new 52-week highs and two new lows.
* Across all Canadian issues, there were 16 new 52-week highs and four new lows, with total traded volume touching 32.61 million shares.