(Adds investment advisor comment, updates prices to close)
* TSX ends down 102.56 points, or 0.70 percent, at 14,498.10
* Six of the TSX's 10 main groups finish lower
* Energy shares plunge 3.7 pct; materials down 1.9 pct
By Alastair Sharp
TORONTO, July 25 (Reuters) - Canada's benchmark stock index lost ground on Monday, weighed by energy stocks that retreated with oil and to a lesser extent by gold miners hurt by lower prices for bullion.
The energy group fell 3.7 percent, as U.S. crude fell to a three-month low below $43 a barrel amid worries about a global supply glut and economic headwind.
The most influential weights on the index included its biggest oil and gas producers, with Canadian Natural Resources Ltd shedding 4.4 percent to C$39.74 and Suncor Energy Inc falling 3.3 percent to C$34.82.
"Until someone or something can make me understand why oil will go back to $60, $70, $80 a barrel I'm staying clear," said
Allan Small, a senior investment advisor at HollisWealth.
Major gold miners also moved lower, with Barrick Gold Corp down 3 percent at C$26.21 and Agnico Eagle Mines Ltd off 4.1 percent at C$67.78, as the price of bullion retreated ahead of central bank meetings in the United States and Japan.
The materials group, which includes precious and base metals miners and fertilizer companies, lost 1.9 percent.
The world's major economies pledged at a G20 meeting this past weekend to use all policy tools available to boost growth.
The Toronto Stock Exchange's S&P/TSX composite index ended down 102.56 points, or 0.70 percent, at 14,498.10. The index notched its highest close in a year on Friday.
Six of the index's 10 main groups finished in negative territory and there were two falling stocks for every gainer.
The most influential gainers on the index included Canadian National Railway Co, up 0.9 percent at C$83.99.
The railway reported slightly lower earnings after the bell as a decline in shipments cut into revenue, but said it expects volumes to improve in the months ahead.
Rogers Communications Inc, which reported strong earnings last week, added 1.7 percent to C$57.80. (Editing by Sandra Maler)