The Fed downgraded its view of the labor market and economy in Canada's largest trading partner, leaving some investors to wonder what factors could coax the Toronto Stock Exchange's benchmark S&P/TSX composite index <.GSPTSE> higher.

"Leaving oil aside, I don't know what else can rescue the TSX, that's my problem," said Keith Richards, a portfolio manager and technical analyst at ValueTrend Wealth Management in Barrie, Ontario. "I'm wait and see on oil, and that's why I'm wait and see on Toronto."

Mixed earnings reports also buffeted the market.

Valeant Pharmaceuticals International Inc's (>> Valeant Pharmaceuticals Intl Inc) shares jumped 3.7 percent to C$256.30 on a stronger sales outlook, while disappointing earnings from business software company OpenText Corp (>> Open Text Corporation) pushed its stock down 6.3 percent to C$62.46.

Crude prices hit their highest level this year, and were on track for a more than 20 percent gain in April as U.S. data suggested a U.S. supply glut may be starting to ease.

The index's energy group gained 0.9 percent, led by Canadian Oil Sands Ltd's (>> Canadian Oil Sands Ltd) 3.6 percent rise to C$12.66, and Suncor Energy Inc's (>> Suncor Energy Inc.) 0.4 percent increase to C$39.88. Crescent Point Energy Corp (>> Crescent Point Energy Corp) added 1.5 percent to C$31.96.

At the other end of the group, top decliners included two pipeline companies: Enbridge Inc (>> Enbridge Inc) fell 1.3 percent to C$63.95, and TransCanada Corp (>> TransCanada Corporation) slid 1.8 percent to C$56.04.

The benchmark index unofficially ended up 1.27 points, or 0.01 percent, at 15,347.34. Six of its 10 main sectors fell, and there were just as many declining stocks as advancers.

The materials group gained 0.5 percent, helped by advances by gold miners. Goldcorp Inc (>> Goldcorp Inc.) climbed 1.5 percent to C$24.21 and Barrick Gold Corp (>> Barrick Gold Corp.) gained 1.4 percent to C$16.22.

"Gold stocks have really been trashed. The commodity seems to have bounced around a little bit. But ... maybe it's settled down and maybe the stocks will take hope from that," said John Kinsey, a portfolio manager at Caldwell Securities, adding that gold miners' quarterly results so far have been reasonably good.

(Additional reporting by Solarina Ho; Editing by Peter Galloway)

By Alastair Sharp