Hedging A Position You Cannot Trade

An executive holds a large block of restricted stock in the company they work for, locked up for another two years. A fund holds a private equity stake with no public market at all. In both cases, the holder is exposed to a real, sizeable risk — but cannot sell, cannot short the position directly, and often cannot even trade options on it. The position is real; the ability to trade it is not. Hedging something you cannot trade means finding a different, tradeable instrument that moves similarly enough to offset the risk, even though it isn't the same asset.

The proxy hedge

If the restricted stock is in a mid-cap software company, a trader might short a basket of publicly traded software peers, or a sector ETF, sized to roughly match the dollar exposure and historical beta of the locked-up stock. This doesn't eliminate the risk — it only offsets the part of the risk that moves in common with the proxy. Anything specific to the actual company (a product failure, an accounting problem, an acquisition) isn't covered by a sector-wide short, because the proxy was never the same asset to begin with.

This is basis risk in its most extreme form: the "hedge" and the position are related only by correlation, not by being the same underlying, so the gap between them can be large and can change over time as the company's own story diverges from its peers.

Worked example

An employee holds $2m of restricted stock in a biotech company, locked up until an IPO restriction lifts. The stock has historically moved with a beta of about 1.3 relative to a biotech sector ETF. To hedge roughly $2m of directional exposure, they short approximately $2.6m of the ETF ($2m \times 1.3), reasoning that if the whole sector sells off, the ETF short will offset most of the loss on the locked stock. If instead the company's own drug trial fails — a company-specific event with no sector-wide echo — the ETF short does nothing, and the loss on the restricted stock is not offset at all.

What this means in practice

Proxy hedges are a partial answer, not a full one, and the quality of the hedge depends entirely on how much of the position's risk is systematic (shared with the proxy) versus idiosyncratic (specific to the untradeable asset itself). For a diversified private equity stake, a broad market proxy can capture a meaningful share of the risk. For a single concentrated stock position, the idiosyncratic share is often the majority of the risk, and a proxy hedge only ever removes part of the exposure.