* TSX down 84.32 points, or 0.63 percent, at 13,311.67
* Five of index's 10 main groups finish lower
* Oil and gold prices fall (Updates to close, adds details, comment)
By Solarina Ho
TORONTO, Jan 6 (Reuters) - Toronto's main stock index closed sharply lower on Thursday as a slide in oil and gold prices and disappointing U.S. economic data weighed on heavyweight energy, mining and financial shares.
Among oil companies, Suncor Energy (SU.TO) fell 2.88 percent to C$37.14 and Canadian Natural Resources (CNQ.TO) slid 3.03 percent to C$42.95. Imperial Oil IMO.TO was another big decliner, down 2.64 percent at C$39.76. The energy group led the index's retreat, falling 1.73 percent.
Oil prices dropped more than 2 percent to below $89 a barrel as a stronger dollar and December U.S. retail sales data that missed Wall Street estimates deterred cautious investors, who were waiting to see if recent positive economic reports would translate into greater consumer demand. [O/R] [ID:nN06127073]
Royal Bank of Canada (RY.TO) was off 0.92 percent at C$51.61. Mining giant Barrick Gold (ABX.TO) extended its slump, sliding 1.54 percent to C$49.07. Goldcorp (G.TO) also fell, dropping 2.28 percent to C$42.94.
The index's materials group, home to mining stocks, was down 1.16 percent. Financial issues, often influenced by economic factors, slipped 0.28 percent.
Safe-haven bullion retreated for a fourth straight day as the U.S. dollar strengthened and expectations grew that Friday's U.S. employment data will beat forecasts. [GOL/]
The Toronto Stock Exchange's S&P/TSX composite index .GSPTSE closed down 84.32 points, or 0.63 percent, at 13,311.67. Five of the index's main groups lost ground.
"Certainly the economic indicators have been good, so it's almost like good news is bad news, especially for gold," said Laura Lau, senior portfolio manager at Sentry Select Capital Corp.
"It looks like bond yields are in general going up, so gold becomes a little less desirable. There's certainly some profit-taking, there's no doubt about that."
($1=$1.00 Canadian) (Reporting by Solarina Ho; editing by Peter Galloway)