Estimating Net Vega Exposure in VIX Exchange-Traded Products

Summary

The document gives a proposed way to estimate the aggregate vega exposure of volatility-linked exchange-traded products. For an individual product, the answer scales its shares outstanding by share price and leverage, then divides by the one-month constant-maturity VIX future. It also offers an equivalent formulation using market capitalization in place of shares times price.

To estimate a net exposure across products, add the vega estimates for long positions and subtract those for short positions. The answer illustrates that leverage differs across products, so the applicable multiplier must reflect each product’s stated exposure. This is presented as a practical calculation, not a derivation or independently validated method; the document does not explain units, assumptions, or how closely the estimate matches a desk’s reported exposure.

Key ideas

• Estimate an individual VIX ETP’s vega by scaling its market value by leverage and dividing by the one-month constant-maturity VIX future.
• Market capitalization can replace shares outstanding multiplied by share price.
• Use each product’s leverage when calculating its exposure.
• Net exposure is the sum of long ETP vega minus short ETP vega.
• The document provides no derivation or validation of the estimate.

Tags

# VIX ETP Net Vega exposure


# VIX ETP Net Vega exposure












Does anyone know the calculation that these EQD desks are using to calculate the net Vega exposure of the VIX ETPs?

I am assuming it involves shares outstanding in each ETP, the value of a 30 day constant maturity future or SPVXSTR Index but everything I've tried has not yielded the same results.

I've reviewed a few of the prospectuses for these ETPs but it just states that they track +1/-1x the performance of SPVXSTR Index.

Could anyone help out with a methodology that is being used here?

Thank you.

see example attached:

## Answer by Jitesh (score 3)

https://quant.stackexchange.com/a/28325

Vega = Shares Outstanding * Share Price * Leverage / 1m Constant Maturity VIX Future

Alternatively, Vega = Current Market Cap * Leverage / 1m Constant Maturity VIX Future

e.g. Leverage = 2 for TVIX, 1 for VXX

Net Vega = Total Long ETP vega - Total Short ETP Vega

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