Shares of some top managed care companies are up at 10 a.m.:

Aetna rose $.57 or .7 percent, to $79.34.

Cigna Corp. rose $.57 or .6 percent, to $93.71.

Humana Inc. rose $1.15 or .9 percent, to $124.34.

UnitedHealth Group rose $.69 or .8 percent, to $84.47.

WellPoint rose $.47 or .4 percent, to $113.34.