* TSX ends down 0.69 percent at 11,360.76

* Oil prices fall below $77 a barrel, gold retreats

* Guarded Wal-Mart outlook adds to investor concerns (Adds details)

By Jennifer Kwan

TORONTO, Nov 12 (Reuters) - Toronto's main stock index fell on Thursday as retreating oil and gold prices sent shares of heavyweight energy and mining companies lower.

EnCana Corp (ECA.TO: Quote, Profile, Research) was down 2.4 percent at C$59.25 and Barrick Gold (ABX.TO: Quote, Profile, Research) sank 1.8 percent to C$44.25. Canadian Natural Resources (CNQ.TO: Quote, Profile, Research) fell 1.8 percent to C$69.47.

The broader energy and materials sectors dropped 1.4 percent and 1.7 percent respectively, as U.S. oil prices CLc1 fell to below $77 a barrel, while gold edged off the record high it hit early on Thursday as the U.S. dollar recovered from recent lows. [O/R][GOL/]

"It's right across the board. The Canadian dollar is a little weaker on the back of the commodity market being a bit weaker, which is on the back of the U.S. dollar being stronger," said Bruce Latimer, a trader at Dundee Securities.

Investor sentiment was also slightly bruised by a guarded earnings outlook for the crucial Christmas quarter from retail giant Wal-Mart (WMT.N: Quote, Profile, Research), casting doubt about the strength of consumer spending in the economic recovery. [ID:nN12404234]