How would poor investment returns affect public pension funding and contributions?
Core argument: A stochastic simulation of 187 large state and local pension plans finds that under poor but historically plausible investment returns, about 11% of plans would see very large drops in funded status and several would be at or near insolvency.
Most state and local governments provide defined benefit (DB) pension retirement plans to their employees. A traditional measure of the funded status and hence the security of a pension plan is its funded ratio, that is, the ratio of assets to liability. Using a 2022 database of 187 large pension plans, basic plan features and conditions, actuarial relationships, simple economic projections, and varied bond and stock investment returns based on past ten-year historical periods in the US and the current asset allocation of the plans, I create a risk model. This risk assessment is denominated as the range of reasonably possible future actuarial funded ratios and amounts of indicated employer contributions across plans, when investment performance is poor but within historical experience. Several plans would be at or near insolvency, about 11 percent of plans would see very large drops in funded status, while employer contributions would, on average, double, and for about one in seven plans, triple. At the 25th percentile, shown in Exhibit 5, the modal projected funded ratio is around 75%, the liability-weighted mean is 72%, few plans are fully funded, and a substantial segment is below 50% funding, with a few showing severely worsening funded ratios.




