See-sawing crude oil prices also played havoc on the resource-rich index as the OPEC producers group kept its oil output target unchanged and the U.S. dollar surged.

The Toronto Stock Exchange's S&P/TSX composite index <.GSPTSE> ended down 62.23 points, or 0.41 percent, at 14,957.16.

That was its first sub-15,000 finish since mid-May and followed a 0.9 percent slip on Thursday. The index lost 0.4 percent on the week.

"Markets in the last two days have been caught in the crossroads of Greece, the uncertain implications of its debt problems on the future of the euro zone, and the employment figures – better North American job growth driving further speculation around the timing of an upcoming Fed rate hike," said Craig Fehr, Canadian market strategist at Edward Jones in St. Louis, Missouri.

"Volatility has been the clear result as the markets try to digest these issues," he said. 

Weakness in some commodity prices, which was spurred in part by a stronger U.S. dollar, weighed on shares in the index's mining-heavy materials sector, which fell 1.2 percent. Goldcorp Inc (>> Goldcorp Inc.) dropped 2.7 percent to C$21.43, and Barrick Gold Corp (>> Barrick Gold Corp.) gave back 2.7 percent to C$14.24.

In the energy group, which ended barely higher overall, Enbridge Inc (>> Enbridge Inc) fell 1.4 percent to C$58.37 and Canadian Oil Sands Ltd (>> Canadian Oil Sands Ltd) added 2 percent, to C$10.71.

Insurers were among the most influential gainers, with Manulife Financial Corp (>> Manulife Financial Corp.) rising 0.6 percent to C$23.68 and Sun Life Financial Inc (>> Sun Life Financial Inc) up 0.9 percent at C$41.15.

Colin Cieszynski, chief market strategist at CMC Markets, said he expects volatility in commodity prices to weigh on the TSX if the U.S. dollar stays robust.

Dairy-products producer Saputo Inc (>> Saputo Inc.), which missed quarterly profit expectations on Thursday, was down another 2.6 percent at C$31.71 after dropping some 4.7 percent in the previous session.

(Reporting by John Tilak and Solarina Ho; Editing by Peter Galloway and Meredith Mazzilli)

By Alastair Sharp