Forced deleveraging

The most confusing days in markets are the ones where prices fall hard and the news offers nothing to blame. The explanation is usually not information but plumbing: somewhere, a risk limit was breached, and a model started selling.

The chain is impersonal. An institution runs a risk budget expressed through a model like Value at Risk. Volatility rises — for any reason — and the model reports that yesterday’s portfolio now “contains more risk” than the mandate allows. Positions must go. The selling moves prices, which raises measured volatility, which tightens the constraint again, at every institution running a cousin of the same model. Nobody in the chain is panicking; every desk is following its rules. The aggregate is indistinguishable from panic.

Two consequences for a private investor. First, understand what you are watching: the professionals who look strangely mechanical near a bottom are being mechanical — their models are doing the selling. Second, respect the sequencing: buying into a falling market while forced sellers are still active means catching supply that has to come out regardless of price. The fear gauges that signal whether that phase is still running — and the discipline for waiting it out — are in the articles below.