By Solarina Ho TORONTO, Jan 25 (Reuters) - Canada's main stock index was little changed on Friday, retreating from early session gains, as lower bullion prices pressured gold miners. Gold prices fell after the European Central Bank said banks would repay 137 billion euros ($183.2 billion) in cheap loans, opting to hand back early more cash than expected. The move reassured investors the euro zone banking system is stabilizing, but undermined their interest in bullion as a hedge against risk. "The pullback in gold is for good reason today because the LTRO (long-term refinancing operations) repayment has signaled shrinkage in the ECB balance sheet. That's the opposite of what's been happening over the last few years," said Fergal Smith, managing market strategist at Action Economics. Seven of the top nine biggest drags in the index were gold miners. Kinross Gold Corp led, slumping 4.6 percent to C$8.59, while Goldcorp Inc fell 1.6 percent to C$35.82. Barrick Gold Corp was off 1.1 percent at C$33.07. Gold mining stocks were down 1.8 percent, while the overall materials group, where mining firms reside, was down 1.15 percent. The Toronto Stock Exchange's S&P/TSX composite index was down 2.78 percent, or 0.02 percent at 12,820.84 late morning. Only two of the index's 10 main sectors were in negative territory. Positive investor sentiment from the bank repayments and news that business morale in the continent's biggest economy, Germany, improved for a third consecutive month in January, helped stem losses. "I think broader rotation into risk assets has dominated, propelled by the higher-than-expected LTRO repayment by European banks, but also European economic data including the improvement in the German Ifo," said Smith, referring to the business climate index put out by the Munich-based Ifo think tank. Oil prices, on track to close for a seventh consecutive week of gains, rose on the back of the economic data along with recent data out of China and the United States. Energy stocks climbed 0.48 percent, led by Canadian Natural Resources Ltd, which was up 1.1 percent at C$31.00. Pacific Rubiales Energy Corp climbed 5.6 percent to C$23.71 following its announcement that it has discovered oil in Brazil. Potash Corp was the single most positive influential stock on the index, rising 2 percent to C$43.47. The fertilizer giant extended Thursday's gains after it's fellow fertilizer maker, Agrium, raised its profit forecast amid expectations for higher fertilizer demand.