Centerra Gold Inc CG.TO climbed 0.4% after Raymond James turned bullish on the gold miner. By Johann M Cherian June 1 (Reuters) - Canada's main stock index was little changed on Thursday as data showing domestic factory activity contracted in May offset investor optimism over a likely pause in U.S. rate hikes and a debt ceiling deal. GOL/ The TSX logged its worst monthly performance this year in May as a weak outlook for commodities, a string of disappointing earnings from top lenders, uncertainty protracted U.S. debt deal negotiations and inflation worries hit investor sentiment.