Wall Street was on track to open with losses as the initial euphoria over the 90-day truce in the U.S.-China trade war faded.

Progress on US-China trade over the weekend sent stocks soaring on Monday. Some top commentators say tariffs are still a big risk.

Wall Street's three major indexes rallied sharply on Monday with the S&P 500 hitting its highest levels since early March as a U.S.-China agreement to temporarily slash tariffs brought some hopes for the easing of a global trade war,