Investors want to see whether Aetna Inc. can turn in a strong second-quarter performance of its own Tuesday following good results from the country's other biggest health insurers.

WellPoint Inc.'s second-quarter net income jumped 24 percent, as an acquisition boosted revenue and a lower-than-expected increase in medical costs helped the nation's second-largest health insurer.

Still a little hazy about the health care overhaul? You have plenty of company.

UnitedHealth Group, the largest provider of Medicare Advantage plans, warned Thursday that funding cuts for the privately-run versions of the federal Medicare program will force it to reconsider its expectations for earnings growth next year.

UnitedHealth Group's first-quarter earnings sank 14 percent, as medical costs dulled enrollment-fueled revenue gains for the nation's largest health insurer, which also expects federal budget cuts will pressure its performance the rest of the year.

UnitedHealth Group Inc. will give investors and analysts an initial look at how 2013 is developing for health insurers when it reports first-quarter results on Thursday.

Walgreen Co. has stretched the reach of its drugstore clinics beyond treating ankle sprains and sinus infections to handling chronic diseases such as diabetes, asthma and high blood pressure.

Drugstore chain Walgreen's fiscal second-quarter earnings climbed 11 percent, helped by contributions from European health and beauty retailer Alliance Boots, a business sale gain, and its new contract with Express Scripts Holding Co.