Calculating Net and Gross Portfolio Exposure

Summary

The document defines portfolio exposure measures using the dollar values of long positions, short positions, and cash. Long value is aggregated as a positive amount, while short positions are treated by their absolute dollar value when calculating total equity and gross exposure. Dollar net exposure is long value minus absolute short value; dollar gross exposure is the sum of both sides. Dividing these measures by total equity gives percentage net and gross exposure, while cash divided by equity gives the cash allocation.

A separate answer summarizes the same distinction as signed versus absolute exposure: net exposure adds positions with their signs, while gross exposure adds their absolute values. A dollar-neutral portfolio can therefore have zero net exposure but retain substantial gross exposure. The document does not use a correlation matrix to compute these measures and does not cover risk-adjusted or factor exposures; its formulas describe dollar exposure accounting, not how correlated holdings affect portfolio risk.

Key ideas

• Dollar net exposure is long value minus the absolute value of short positions.
• Dollar gross exposure adds long and absolute short values.
• Percentage exposure measures divide the relevant dollar amount by total equity.
• A portfolio can be dollar-neutral while still having nonzero gross exposure.
• The formulas describe dollar accounting and do not incorporate correlations.

Tags

# Confused on Portfolio's Net Exposure


# Confused on Portfolio's Net Exposure












I am trying to calculate the Net Exposure of Portfolio including bonds, stocks, Gold, etc.

Firstly, I calculate the net exposure of every product/symbol(Long position minus Short position).

Then, I just sum up all the absolute value of every net exposure?

Should I consider the correlation matrix?

Thank you so much.

## Answer by nbbo2 (score 2, accepted)

https://quant.stackexchange.com/a/42612

A hedge fund will generally have three kinds of positions: Cash, Long Positions and Short Positions.

You find the value of long positions (VLP) by adding up the dollar values of all long positions. You find the value of short positions (VLS, which will be a negative number) by adding up the dollar values of all short positions.

Then the Total Equity is defined as TE = Cash + VLP - |VLS|

The dollar net exposure is DNE = VLP - |VLS|

The dollar gross exposure DGE = VLP + |VLS|

The percent net exposure is %NE = DNE/TE

The percent gross exposure is %GE = DGE/TE

The cash exposure is %CASH = Cash/TE

(A fund with zero gross exposure will be 100% in cash).

## Answer by Ezy (score 1)

https://quant.stackexchange.com/a/42607

the gross dollar exposure is the sum of all absolute values of your dollar exposures.

the net dollar exposure is the sum of all the signed values of your dollar exposures.

a dollar neutral portfolio has 0 net dollar exposure but has a non-zero gross dollar exposure

a zero gross dollar exposure implies your portfolio is actually empty

hope this clarifies

Shown in full with attribution under the source's licence. Licence: CC BY-SA 4.0 (Stack Exchange)

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.