Summary: Wall Street held mostly lower in a quieter end to a record-breaking week in which stocks scored their best winning streak in a quarter century. That record rally has flagged over the past two days. UnitedHealth led the Dow Jones Industrial Average's losses after the Department of Justice joined a lawsuit accusing the health care company of overcharging Medicare. The company reportedly overcharged "hundreds of millions? and likely billions?of dollars." Deere exceeded first-quarter estimates and offered positive guidance. The agricultural equipment company anticipates full-year sales growth of 4%, higher than consensus of a flat reading. WebMD fluctuated after indicating it was open to selling itself. The online medical encyclopedia said it was looking into strategic alternatives, which could involve selling all or part of the company.
