And just this week as the U.S. and China reached an initial deal that greatly lowered tariff levels, the three major indexes soared. The S&P 500 even moved into positive territory for the year after earlier falling as much as 15%.

The United States and China announced that they have agreed to temporarily lower tariffs, after a weekend of marathon negotiations in Geneva, Switzerland. CNN’s Kristie Lu Stout breaks down what we know about the agreement.