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Net exposure

The signed sum of exposures expressed in one unit. It describes a balance under the chosen convention, but zero net exposure does not mean risk-free or neutral to every factor.

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Who this is for — Anyone who wants the long-short balance under a precise convention without mistaking it for universal neutrality.

Net exposure is the signed sum of exposures Eᵢ expressed in the same unit:

N = ∑ᵢ Eᵢ; N / NAV = ∑ᵢ Eᵢ / NAV

If Eᵢ is market value for cash positions in one currency, the result is monetary net exposure. If Eᵢ is beta-adjusted, delta equivalent or DV01, the result measures the balance of that specific sensitivity. Changing the unit changes the question and may change the sign of the result.

Exposure: the same positions, three different readings Perimeter, unit and sign convention come before the number Exposure: the same positions, three different readings Perimeter, unit and sign convention come before the number POSITIONS IN SCOPE Long A +120 signed value under the chosen… Short B −80 signed value in the same unit 1 Exposure quantity × price / sensitivity A relationship to a price,factor or entity; it depends oninstrument and unit. 2 Gross exposure |+120| + |−80| = 200 Sum of absolute values: scalebefore offsetting. 3 Net exposure +120 − 80 = +40 Algebraic sum: residualdirection within the chosenperimeter. ≠ SMALL NET ≠ SMALL RISK Basis, options, currency, liquidity and counterparty exposures may remaineven when long and short positions offset. Cyclepedia · source-checked visual explainer
Net exposure shows the signed balance; it does not prove neutrality to every risk.

Net with respect to what?

Convention Balance described What it does not guarantee
market value dollar/euro longs minus shorts beta neutrality
beta-adjusted linear sensitivity to a benchmark sector or nonlinear neutrality
delta-adjusted local sensitivity to an underlying gamma, vega or gap neutrality
DV01 sensitivity to a small rate move curve, spread or convexity neutrality
currency balance against an exchange rate offset of other factors
scenario net P&L under one stated shock outcome under different scenarios

A cash portfolio long 120 and short 120 has zero monetary net and gross 240. If the two legs have different betas, sectors, liquidity or currencies, the portfolio can remain strongly directional to those factors. “Market-neutral” is therefore a property to define and test, not an automatic synonym for near- zero monetary net exposure.

Net exposure and netting are different

Market net exposure is an analytical aggregation of positions. Legal netting instead determines which receivables and payables can be offset after default under enforceable agreements and a specified netting set. Two positions that offset economically may not offset legally; conversely, a netting agreement does not remove basis, liquidity or residual market risk.

There is no universal cap for net exposure. A limit should be expressed in the sensitivity the mandate seeks to control and accompanied by gross exposure, concentrations and scenario losses.

Common mistake — Adding equities, options and bonds as signed notional and calling the result “effective directional risk”. A common economic basis and the relevant sensitivities must come first.

Checklist

  1. State the exposure basis, currency, benchmark and date.
  2. Calculate gross and net from the same population of positions.
  3. Keep beta, delta, DV01, currency and scenario balances separate.
  4. Retest sensitivities after market moves and rebalancing.
  5. Record legal netting, collateral and counterparties separately.

Sources

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