Obama's squeeze on health sector sends investors fleeing

4%. UnitedHealth Group slumped $2.96, or nearly 13%, to $20.07. It’s down 28% this week. Humana Inc. plunged 19.5% today, to $23.64, and is off 42% this week. Woodland Hills-based Health Net Inc. slid 9.4% to $13.44 for the day and is...