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It’s a long time since I traded any vol but I think we looked at “adjusted vega” ie vega divided by sqrt of time to expiry. Ring any bells?
sounds like an adjustment to annualize the risk. only works though if the stdv of p&l is the same for long and short maturities
I think it's more about normalisation of the vol risk as you'd expect the Vol move to decrease with time in a 1/sqrt(t) manner
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