US equity markets mostly firmer as investors digested the latest round of corporate earnings releases and eye gross domestic product (GDP) figures tonight AEST and inflation figures on Thursday night AEST (29 February) - Dow fell -97-points or -0.25%. UnitedHealth Group Inc (down -2.27%) after the Wall Street Journal (WSJ) reported that the Justice Department has launched an antitrust investigation into the health-insurance giant. Antitrust investigators have asked how UnitedHealth’s acquisitions of doctor groups might affect competitors and consumers, the Journal reported, citing people familiar with the meetings.