* TSX down 76.51 points, or 0.49 percent, to 15,543.14
* All 10 of TSX's main industry groups end lower
By Solarina Ho
TORONTO, May 3 (Reuters) - Canada's main stock index retreated on Wednesday as lower commodity prices weighed on resource stocks, while negative sentiment around troubled Home Capital Group Inc spilled over into the broader financial sector.
The Toronto Stock Exchange's S&P/TSX composite index closed down 76.51 points, or 0.49 percent, at 15,543.14. All of the index's 10 biggest groups lost ground.
"More so than anything, it's the Home Capital sentiment spillover that's leading to some caution," said Bryden Teich, portfolio manager at Avenue Investment Management.
"That kind of sentiment could linger for a little bit, but fundamentals still look pretty good."
The overall materials group, home to precious and base metals miners and fertilizer companies, lost 1.3 percent, tracking falls in base metals, including copper and nickel. Copper prices fell 3.5 percent to $5,600.15 a tonne.
Teck Resources Ltd fell 5.8 percent to C$26.64, while First Quantum Minerals Ltd gave back 5.4 percent to C$12.03.
Kinross Gold Corp and Tahoe Resources Inc tempered some of the losses and were among the most positive influential movers, after the gold miners reported strong results late on Tuesday. Kinross jumped 10.7 percent to C$5.08, while Tahoe surged 15.1 percent to C$12.35.
The financials group, which accounts for roughly a third of the entire index's weight, dipped 0.2 percent.
Home Capital, which is delaying its earnings results, saw its shares fall 11.7 percent to C$6.84. Depositors have rushed to pull their money out of the non-bank lender after it faced regulatory allegations.
"It really shows how quickly liquidity or confidence in a financial institution can totally evaporate within a couple of weeks," said Teich. "Once your liquidity is gone, kapoof, you're done."
Energy stocks also edged lower, slipping 0.2 percent, with Suncor Energy Inc down 1.0 percent to C$42.69.
Torstar Corp shares, which touched a record low of C$1.29 in intraday trade, tumbled 9.6 percent to finish at C$1.50 after the newspaper publisher reported a wider-than-expected loss.
Declining issues outnumbered advancing ones on the TSX by 190 to 54, for a 3.52-to-1 ratio on the downside.
The index was posting 11 new 52-week highs and three new lows.
Reporting by Solarina Ho; Editing by Peter Cooney