The current low level of interest rates poses a big challenge to pension plans with benefits guaranteed by their corporate sponsors. These pension plans have a difficult time earning a decent return from high-quality bonds with relatively low risk.
In response, Congress has recently revised the rules for calculating the obligations of corporate pension plans. But these revised rules allow corporate pension plans to assume that they will earn unrealistically high returns. As a result, many corporate sponsors will not contribute enough to meet their likely benefit obligations to retirees.