CANADA STOCKS-TSX falls on weaker commodities, banks
* S&P/TSX composite down 0.9 percent at 11,573.82
* Mining, energy, financials lead slide
* Barrick falls more than 3 percent (Adds details, quotes)
By Claire Sibonney
TORONTO, Jan 21 (Reuters) - Toronto's main stock index was lower on Thursday, as miners and energy producers were hit by softer commodity prices and financials retreated on uncertainty ahead of a White House proposal to crack down on risk-taking by U.S. banks.
President Barack Obama will make the announcement at 11:40 a.m. (1640 GMT). The tighter guidelines, which are expected to be broad and would require congressional support, are among a series of measures designed to revamp the country's financial regulatory system. [ID:nN21203704]
"It puts a little bit of uncertainty in the market, but obviously his statements are going to take a long time to sort out as it usually does in the political system," said Bruce Latimer, a trader at Dundee Securities.
All of Toronto's six big banks were lower, with Toronto-Dominion Bank TD.TO, down 1.53 percent at C$62.88 and Bank of Nova Scotia BNS.TO, off 1.61 percent at C$45.21, among the index's top decliners.
At 10:49 a.m. (1549 GMT) the Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 105.5 points or 0.9 percent at 11,573.82 after falling 1 percent minutes earlier. Continued...