UNH stock just did something to the Dow Jones you rarely see

Jan. 27 produced something one rarely sees in the stock market. One stock fell so hard that its loss caused the Dow Jones Industrial Average to fall about 409 points, or 0.8%, to 49,003. The culprit was health-insurance giant UnitedHealth Group (UNH), which fell 68.94 points, or 19.6%, to $282.70. A primary reason was a Trump administration proposal to keep Medicare rates roughly flat next year, something the industry and investors didn't expect. In addition, the company forecast a decline in revenue i ...