* TSX falls 11.46 points, or 0.09 percent, to 12,516.89 * Nine of 10 main index sectors decline * Gold-mining shares jump on higher bullion * Potash Corp the biggest negative influence on the index * Wi-Lan soars 16 percent By John Tilak TORONTO, July 16 (Reuters) - Canadian stocks fell on Tuesday as slumping Potash Corp shares offset gold-miner gains, but market attention was locked on what Federal Reserve Chairman Ben Bernanke might say on Wednesday about the U.S. central bank's stimulus program. Potash, the world's biggest fertilizer producer, dropped 3.3 percent after disappointing results from rival Mosaic Co reflected falling potash prices and raised concerns about demand. Potash's fall was the biggest negative influence on the index. The market also processed mixed U.S. earnings reports as well as data that showed U.S. consumer prices rose in June, while underlying inflation pressures were stabilizing. Investors awaited congressional testimony from Bernanke to try to get a sense of when the Fed will begin to dial back its bond-buying program. Bernanke's comments last week that the Fed's stance would stay accommodative drove global markets to record levels. "People are stalled at this point, waiting for the next catalyst," said Diana Avigdor, portfolio manager and head of trading at Barometer Capital Management. "Bernanke is pretty good at managing expectations," she added. "The market is hoping that he will reiterate his message last week that it's going to be a long, long time before the accommodative policy ends." The Toronto Stock Exchange's S&P/TSX composite index closed down 11.46 points, or 0.09 percent, at 12,516.89. The benchmark Canadian index, which is up slightly on the year, has sharply underperformed the S&P 500 this year. "Given the shakeout we've seen in the commodities sector in the last year or two, it will take some time before global fund managers come back, but the 'sell Canada' theme is now on hold," Avigdor said. Nine of the 10 main sectors on the index were in the red on Tuesday. Shares of energy producers gave back 0.3 percent despite a rise in the price of oil. In the group, Canadian Natural Resources Ltd was down 0.2 percent at C$32.93, but Suncor Energy Inc added 0.4 percent to C$32.43. Most of the action was centered on the materials sector, which includes mining stocks. The group gained 2.2 percent on a jump in shares of gold miners, but Potash Corp's decline limited the sector's gains. Gold producers gained 4.9 percent, lifted by a higher bullion price. Barrick Gold Corp added 5.9 percent to C$16.62, and Goldcorp Inc rose 5.1 percent to C$28.15. Shares of Canadian patent licensing company Wi-Lan Inc soared 16.1 percent to C$3.83, shrugging off a court ruling that four of its patents had not been infringed.