TORONTO (Reuters) - Toronto's main stock index ended higher for a second straight session yesterday as commodity prices got a boost from a weak US dollar, which fell on expectations the US Federal Reserve would engage in further monetary easing.

Resources, which are largely priced in US dollars, surged on a sell-off in the greenback after this past weekend's Group of 20 leaders meeting in South Korea produced few firm policy initiatives, giving investors little reason to stop selling the US currency.

"The weakness in the US dollar stems from a general view that the greenback is headed even lower from these levels and the G20 conference over the weekend hasn't done much to alleviate concerns about the ongoing weakness in the US dollar," said Elvis Picardo, an analyst and strategist at Global Securities in Vancouver.

The greenback fell broadly on Monday as traders sold it on the view that the US central bank was ready to turn on the printing press again next week.

The Fed is expected to launch a second round of asset purchases at its November 2 to 3 meeting, a process intended to push down interest rates and one that would make the US dollar less attractive than higher-yielding currencies. The Toronto Stock Exchange's S&P/TSX composite index ended the session up 62.4 points, or 0.5 percent, at 12,663.58. It peaked at 12,692.59, its strongest level since October 14.

The blue chip S&P/TSX 60 index closed 2.78 points higher, or 0.38 percent, at 728.68.

Six of the TSX's 10 main sectors were higher, with a 1.3 percent advance in the heavily weighted materials group. The Thomson Reuters-Jefferies CRB index, a global commodities benchmark, was up more than one percent as the price of key resources such as oil, gold and copper rose.

Teck Resources jumped 1.7 percent to C$46.26, while Canadian Natural Resources advanced 0.1 percent to C$36.71, and Goldcorp pushed up 0.8 percent to C$43.55.

"There's strength in commodities across the board and that's translating into a stronger TSX on the day," said Mr. Picardo.

Copper miner Equinox Minerals added 0.52 percent to C$5.81 after it said it would buy Australian-listed Citadel Resource Group for $1.23 billion. The deal could give Equinox the same copper output as BHP Billiton's Olympic Dam mine, the world's fourth-largest deposit.