Insurer AmTrust Financial Services Inc. is buying CPPNA Holdings Inc. for about $40 million, adding a seller of services designed to help protect against identity theft to its business.

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.

Stocks are opening lower on Wall Street after several big companies including Bank of America reported financial results that fell short of what analysts were hoping for.

The new Patient Protection and Affordable Care Act health insurance fee could add about 1.7 percent to the cost of commercial coverage from a for-profit plan in 2014.