Outside the Box: These 3 charts explain the terrifying math behind pension funds’ shortfall

The Chicago Tribune recently wrote about how the decision to reduce the expected-return assumption from 7.5% to 7.0% for the Illinois Teachers Retirement System resulted in the governor calling for approximately $400 million in additional taxes.

While the political positioning behind this small move of 0.5 percentage point is fascinating, it more importantly brings to the forefront the issue of how large future obligations are, and why there is a lot of fear and an incentive to hide.

If reducing the expected return assumption from 7.5% to 7.0% results in an additional $400 million- 500 million a year of taxes, then moving the liability discount rate to something closer to a risk-free rate of 3% may imply additional $5 billion in additional contributions (Note: the actual number is likely several times higher than this – see the illustration below for some simplified math).

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