Insurers hold back on rate increases
Premium changes are lowest in years
State regulators have approved premium increases averaging 2.3 percent for health insurance covering hundreds of thousands of residents, the most modest hikes in at least a decade and a sign that years of efforts to control costs may be working. The new rates are in Massachusetts’ “small group’’ market, which includes tens of thousands of small businesses as well as self-employed and formerly uninsured individuals. They apply to policies taking effect April 1, the biggest renewal date for coverage.