: UnitedHealth CEO Stephen Hemsley said Thursday analysts shouldn't assume that the nation's largest health insurer will participate widely in the health care overhaul's online insurance exchanges.
ABOUT EXCHANGES: They will allow people to buy coverage that starts in 2014, some with help from income-based tax credits. Many details of the exchanges have yet to be ironed out. They will vary according to each state and target the individual and small-group health insurance markets.
THE RELUCTANCE: Hemsley said the insurer will only participate in exchanges that it deems fair and commercially sustainable and that provide a reasonable return.