TORONTO (Reuters) — The Toronto Stock Exchange’s main index finished flat in the year’s last trading day yesterday, capping a week of winning sessions and marking another year of double-digit percentage gains.The S&P/TSX composite index lost 1.15 points, or 0.01 percent, to close at 12,908.39. On the last trading day of last year, the index closed at 11,272.26, gaining 22 percent for 2005.

Yesterday’s finish gives the gold- and energy-heavy composite a gain of 14.5 percent for the year, but with investors already looking into 2007, some see such returns as becoming more difficult to deliver.

“It gets more challenging with each year of the bull market that goes by,” said Julie Brough, vice-president at Morgan Meighen & Associates in Toronto, but added that a halt of the market’s charge towards levels above 13,000 points is also unlikely, given the depth of liquidity.

“As long as there’s lots of money around, I think it becomes very challenging to stall things out,” she said. “Money needs a home.”

The session’s volume yesterday was as small as earlier this week, with just 185.2 million shares worth C$2.4 billion changing hands.

Overall, six of the benchmark’s 10 key groups finished lower, three gained and one — the key energy sector — was flat. Resource-laden materials added 0.16 percent.