On Friday, the S&P 500 was down 0.6% while Toronto was about unchanged.
On Sunday evening, stock futures are down about 0.6%. Virus cases continue to rise in the U.S. but so far the stock market is not expecting this to lead to a reversal of the reopenings. If there were such a reversal in several or more States then it seems safe to assume that the market would react negatively.
Another possible concern for the market is Donald Trump’s vulnerability to an election defeat. I am not placing any bets on that as Trump certainly surprised most analysts with his 2016 victory.