The followed a public declaration of war by the health insurance industry's lobbying arm against the White House's health care reform efforts.
America's Health Insurance Plans, or AHIP, released a methodologically questionable study on Sunday claiming that the Senate Finance Committee bill would result in higher premiums for families.
Aetna started the day trading at 26.38 per share, went down -3.1% and closed at 25.59.
UnitedHealth Group Inc. opened at 25.17, went down -3.73% and closed at 24.31.
Interestingly, after a majority of members of the Senate Finance Committee voted for the health care reform legislation offered by Sen. Max Baucus, D-Mont., many of those stocks started to creep back up. The Baucus bill does not contain a government-run health care option to compete with private insurers – an option AHIP and its members oppose.
AHIP is now running TV ads against the effort in many states, as ABC News' Teddy Davis takes a look at HERE.
"Is it right to ask 10 million seniors on Medicare Advantage for more than their fair share?" asks the ad's narrator. "Congress is proposing more than $100 billion in cuts to Medicare Advantage. The nonpartisan Congressional Budget Office says many seniors will see cuts in benefits."