August 5(Reuters) - Canada's main stock index opened at a

record high on Wednesday, led by a surge in Shopify shares after

the e-commerce company's revenue forecast exceeded estimates,

while gains in gold prices lifted mining stocks.

The Toronto Stock Exchange's S&P/TSX Composite index

gained 1.5% at 9:30 a.m. ET.

(Reporting by Sudeshna Ghoshal in Bengaluru; Editing by Joyjeet

Das)