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Interpreting VIX Futures Contango Around Expiration

Article Quant Q&A · Author: Jo Smit
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Summary

The document asks whether steep contango in nearby VIX futures as a contract approaches expiration can serve as a useful market-timing signal. The response explains that a VIX futures price reflects the market’s pricing of expected S&P 500 realized volatility over the relevant future period, rather than simply tracking spot VIX. Differences across contract maturities can therefore reflect the calendar window each contract covers.

As an example, the response describes a later-dated contract priced above nearer contracts because its volatility window includes the US election. This offers a calendar-event explanation for the curve shape, but it does not test contango as a timing indicator or provide trading results. The example is tied to a specific market period and should not be treated as evidence of a repeatable signal. The text gives no broader framework for separating event risk from other drivers of the VIX futures term structure.

Key ideas

  • VIX futures prices relate to expected volatility over the period covered by each contract.
  • Different contract maturities can reflect different calendar windows and event exposure.
  • An upcoming election is offered as an explanation for higher pricing in a later contract.
  • The document does not establish that steep contango predicts market direction or timing.

Tags

FuturesVolatilityEvent-drivenUS markets
Full text
# Steep contango in near term VIX as nears expiry date


# Steep contango in near term VIX as nears expiry date












VIX futures expiry on 21 Aug.

VIX curve in very steep contango up to October.

Is there any evidence of this providing a market timing tool of any worth?

Thanks

## Answer by JosephDing (score 1)

https://quant.stackexchange.com/a/80349

VIX futures is the market pricing where the next 30-day realized volatility will be at that expiry. So for example,

VIV24 the Oct 16 2024 VIX contract is at ~18.16, significantly higher than near term (VIU24 the Sep 18 2024 future at 15.68, the almost expired VIQ24 with 2 days left at 15.26, the spot VIX at 14.80) because it covers S&P 500 RV in the period Oct 16 to Nov 15 and this 30 day period includes the US election happening on Nov. 5, 2024.

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.