GENEVA — The US and China agreed to drastically roll back tariffs on each other’s goods for an initial 90 days, de-escalating a punishing trade war and buoying global markets.The two countries willGENEVA — The US and China agreed to drastically roll back tariffs on each other’s goods for an initial 90 days, de-escalating a punishing trade war and buoying global markets.The two countries will