(Adds strategist comment, updates prices to close)
* TSX ends down 62.23 points, or 0.41 percent, at 14,957.16
* First sub-15,000 finish since mid-May
By Alastair Sharp
TORONTO, June 5 (Reuters) - Canada's main stock index fell further on Friday as investors retreated from a range of stocks amid uncertainty about the Greek debt crisis and the timing of possible U.S. rate hikes.
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 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 dropped 2.7 percent to C$21.43, and Barrick Gold Corp gave back 2.7 percent to C$14.24.
In the energy group, which ended barely higher overall, Enbridge Inc fell 1.4 percent to C$58.37 and Canadian Oil Sands Ltd added 2 percent, to C$10.71.
Insurers were among the most influential gainers, with Manulife Financial Corp rising 0.6 percent to C$23.68 and 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, 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.
$1=$1.25 Canadian Reporting by John Tilak and Solarina Ho; Editing by Peter Galloway and Meredith Mazzilli