Multiemployer defined benefit plans continue to be well-funded, according to a Segal Co. survey. A total of 74% of plans were fully funded and the average funded ratio was 96%. The survey analyzed 476 plans with combined assets of $101 billion. The last five surveys have produced few variations in funding ratios, with the percentage of fully funded plans ranging from 65% to 77%. Segal attributes the lowering ratios to plan benefit improvements financed by stellar stock market performance.