Choosing Straddle Maturity for Realized- or Implied-Volatility Exposure

Summary

The document compares short- and long-dated straddles as ways to take a long-volatility position. Its answer links short-term straddles to profits from realized movements that exceed expectations, describing this exposure in terms of gamma. Longer-term straddles are associated with gains when the options market raises its implied-volatility assessment, which the response describes as vega exposure.

This is a concise qualitative distinction rather than a general maturity-selection method. It offers no data, examples, or discussion of pricing, volatility term structure, theta decay, or changes in other option sensitivities. The actual outcome can depend on the path of the underlying and on how realized and implied volatility evolve relative to what is priced, so the stated gamma-versus-vega framing is not a complete assessment of risk.

Key ideas

• Short-term straddles are presented as a way to gain from larger-than-expected realized movements.
• The response associates short-term straddle exposure primarily with gamma.
• Long-term straddles are presented as a way to gain if implied volatility rises.
• The response associates long-term straddle exposure primarily with vega, but does not provide a full risk comparison.

Tags

# Properties of straddles given different maturities


# Properties of straddles given different maturities












Lets say one wants to use straddles to "go long vol". Is there any way to give general properties of the different lengths of expiry of such a strategy. Or general pros and cons of having longer vs shorter.

Or does this depend to much on sentiment?

## Answer by user123124 (score 1, accepted)

https://quant.stackexchange.com/a/54521

If you want to profit from an increase in realized vol (i.e. from bigger than expected stock market movements) buy a short term straddle, if you want to profit from an increase in implied vol (i.e. the option market revises its view of future vol) buy a long term straddle.

Cred. to noob2

I would only add that in the first case you are profiting from Gamma, in the second you are profiting from 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.