(Adds comment from portfolio manager, details; updates prices)
* TSX ends down 20.17 points, or 0.13 percent, at 15,055.99
* Tahoe down 18 pct after Guatemala court upholds mine suspension
* Six of TSX's 10 main groups move lower
By Alastair Sharp
TORONTO, Aug 25 (Reuters) - Canada's main stock index inched lower on Friday, caught between a plunge in Tahoe Resources Inc and jumps in shares of retailer Hudson Bay Co and construction company Aecon Group.
Tahoe ended down 18.7 percent at C$5.58 after hitting an all-time low, as a Guatemalan court upheld the suspension of the license for its Escobal project, one of the world's largest silver mines. The stock had sunk from around C$11 a share to around C$7 in early July, when the mine was first closed.
Hudson's Bay Co spiked 14.2 percent higher to C$11.45 after sources told Reuters that the department store operator is seeking to carry out a review of its strategic options amid pressure from an activist investor.
Construction company Aecon Group Inc jumped 20.2 percent to C$17.24 after it said it had engaged two financial advisers to explore a potential sale.
"If the market doesn't recognize value, you may get activist shareholders who will," said Irwin Michael, portfolio manager at ABC Funds.
"I'm not surprised on Aecon, they're minus a permanent CEO, and in the case of the Hudson's Bay Company, I think there's a lot of confusion out there about what the company really is, whether it's a real estate company or a retailer."
The Toronto Stock Exchange's S&P/TSX composite index ended down 20.17 points, or 0.13 percent, at 15,055.99. Six of its 10 main groups fell.
The index gained 0.7 percent gain on the week.
Pipeline companies weighed on the energy group, with Enbridge Inc down 1.5 percent at C$50.40 and TransCanada Corp off 0.8 percent at C$62.89. As dividend-payers, pipeline firms are sensitive to changes in interest rate expectations.
Investors are focused this week on the annual central banker symposium in Jackson Hole, Wyoming, for clues on the direction of European Central Bank and U.S. Federal Reserve policy. Fed Chair Janet Yellen did not mention monetary policy in prepared marks for a speech at the conference on Friday. (Reporting by Alastair Sharp; Editing by Paul Simao and James Dalgleish)