The gains reflected improvement in the reinsurer's retroactive business and a reduction in losses in its life and annuity business. Earned premiums for the reinsurance unit for the second quarter of 2016 dropped 16.5% from those a year earlier, to $1.65 billion, while earned premiums for the first six months of the year rose 13.7%, to $3.90 billion, from the 2015 period, the company reported Friday.