Yahoo Finance

In true UnitedHealth fashion, the big health insurance stock was denying the Dow of a daily gain on Tuesday. The Dow was down 160 points, or 0.4%, but UnitedHealth stock was shaving 382 points off the index on its own with a nearly 17% drop. UnitedHealth is regularly a thorn in the Dow’s side due to the index’s antiquated weighting by stock price rather than market cap.