HMO Index Sees Worst Selloff in 8 Months By: CNBC.com News April 09, 2012 at 14:49 PM EDT The Morgan Stanley Healthcare Payors Index is having its worst day in eight months on news Ohio will not renew contracts to four current Medicaid providers. Read More >> Related Stocks: Aetna Centene Corp Humana Molina Healthcare Inc UnitedHealth Group Wellcare Group