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* TSX falls 0.67 percent to 11,477.98
* Commodities main drag as oil, gold slip
* Profit-taking cited after five-day run higher (Updates prices and turn in market direction)
TORONTO, Sept 17 (Reuters) - Toronto's main stock index reversed direction to turn lower on Thursday afternoon as profit-taking set in after five straight sessions of gains.
The influential energy and materials groups were the main drags, slipping as the price of gold eased from 18-month highs, while oil held nearly unchanged around $72.60 a barrel.
The oil and gas group was off nearly 1 percent, while materials, home to the gold miners, was down 1.4 percent.
Although the materials group was lower, surging fertilizer stocks kept the sector's decline from deepening. Potash Corp (POT.TO) rose 2.8 percent to C$103.16, while Agrium (AGU.TO) gained 2.6 percent to C$57.13.
At 12:48 p.m. (1648 GMT), the S&P/TSX composite index .GSPTSE was down 77.62 points, or 0.67 percent, at 11,477.98. Six of the index's 10 main groups were lower. The other four showed very slight gains and appeared poised to tip lower.
"We've had all this upside over the last little while that we're taking a pause, and maybe take a little profit or two," said Adrian Mastracci, portfolio manager and president at KCM Wealth Management Inc in Vancouver.
"This is no ordinary recovery and no ordinary market ... We need to have a little pause and it's not a bad idea to sit back and see what really is important to every individual investor before they come back and put some money in."
Earlier, the markets were supported by data on the U.S. labor and housing markets, which reinforced the outlook that the economic recovery was gaining momentum.
Inflation data in Canada had little impact. It showed prices fell by 0.8 percent in August compared with a year earlier, the second-largest 12-month drop in over 50 years. [ID:nN17185718]
$1=$1.06 Canadian Reporting by Ka Yan Ng; editing by Rob Wilson