NEW YORK--(BUSINESS WIRE)--During the second quarter of 2015, the funded status of the model pension plan examined in Sibson Consulting and Segal Rogerscasey’s publication, Prism, increased by 8 percentage points: from 79 percent to 87 percent. This increase was the result of an increase in the effective interest rate and, consequentially, a 10 percent liability decrease, coupled with flat investment performance during the quarter. “The significant increase in funded status caused by rising int