Pension funds are once again wrestling with the denominator problem, the awkward arithmetic that strikes when public markets fall while private-market valuations, slow to be marked down, stay high. The result is that private allocations swell past their targets not because the fund bought more, but because the rest of the portfolio shrank.
The problem forces uncomfortable choices. A fund over its private-market target may have to slow new commitments, sell stakes on the secondary market at a discount, or simply wait for private marks to catch down to reality. Each option has costs, and each ripples out into the wider market.
Why the marks lag
Private assets are valued quarterly and by appraisal, not continuously by a market, so a sharp public drawdown takes time to show up in private books. That lag flatters private returns in a downturn and creates the denominator distortion that allocators then have to manage.
Sophisticated funds plan for this in advance, building commitment pacing models that assume volatility rather than a straight line. The ones caught flat-footed become forced sellers, and forced sellers are where patient secondary buyers find their best prices.