Dow logs worst day in a month. Here are the reasons driving the rout. - MarketWatch
1. DJIA fell 1.9%, its steepest drop in a month. 2. UnitedHealth Group's shares dropped 5.8%, impacting DJIA significantly. 3. Treasury yields rose, raising economic pressure concerns. 4. Consumer stocks like Nike and Target also declined sharply. 5. Weak bond auction increased fears about U.S. fiscal health.