Futures for Canada's main stock index were flat on Friday, after eight successive sessions of gains for the index, as investors refrained from big bets amid uncertainty over U.S. President Donald Trump's latest tariff threats.

U.S. agricultural commodities fell back Wednesday from recent strength after President Trump announced new threats to apply tariffs on Chinese shipments to the U.S., as the ag market is expected to be one of the main industries that would be impacted by the economic fallout of new tariffs.