TORONTO - Canada's main stock index was up more than 250 points in late-morning trading, helped by strength in the base metal, technology and energy sectors, while U.S. stock markets

The S&P/TSX Composite Index is down 355.69 points or 1.02% this week to 34413.45

TORONTO - Canada's main stock index was up more than 250 points in late-morning trading, helped by strength in the base metal, technology and energy sectors, while U.S. stock…