Good morning, it's Tuesday, August 4th and here are the Five Things You Must Know Before the Market Opens, presented by The Street: First up, Markets Cautious on Virus Rise, China Tensions U.S. equity futures traded cautiously Tuesday, while the U.S. dollar resumed its months-long decline, as traders continued to track the global resurgence in coronavirus infections and looked to today's round of talks in Washington for more stimulus spending. Markets were also affected by another flare-up in U.S.