By: Russ Kamp, CEO, Ryan ALM, Inc.

Milliman has just released its monthly Milliman 100 Pension Funding Index (PFI), which analyzes the 100 largest U.S. corporate pension plans. Weak investment returns, estimated at -1.4%, drove the PFI asset level down by $25 billion during March. Current assets for the top 100 plans are now $1.3 trillion. The fall in assets was only partially offset by the rise in the discount rate (13 bps) during the month. As a result, the surplus fell by $7 billion to $51 billion as of March 31, 2025.

The discount rate ended the month at 5.49%, which reduced plan liabilities by $18 billion, to $1.25 trillion by the end of March. As a result of assets falling by more than liabilities, the PFI funded ratio dropped from 104.6% at the end of February to 104.1% at the end of March. For the quarter, discount rates fell 10 basis points and the Milliman 100 plans lost $8 billion in funded status.   

“While the slight rise in discount rates in March led to a monthly decline in plan liabilities, plan assets fell even further due to poor market performance, which caused the funded status to fall below the 104.8% level seen at the beginning of 2025,” said Zorast Wadia, author of the PFI. Given market action during the first 10 days of April, it will be interesting to see if the impact from rising rates can offset the dramatic fall in asset values. Inflation fears fueled by tariffs could lead to rising bond yields, which will help mitigate some of the risk to equities given the possibility of declining earnings. As Zorast mentioned in the Milliman release, “plan sponsors will want to consider asset-liability matching strategies to preserve their balance sheet gains from last year”, especially given that 30-year corporates are once again yielding close to 6%.