Quote from spindr0:
If the total position is a combination of short strangles and and protective backspreads, how can one add one component when vol. is high and the other when low and end uop with the composite position? I have no problem with legging in but that's what you're suggesting but that doesn't always get you there (I'm assuming that vol. doesn't bleed and reverse intraday). What am I missing?
Spin,
You'll have to take risk somewhere, so I'm not suggesting anything magical, but rather positioning your inventory to take advantage of the mean reversion of vol. Assume that your product is some big index and your inventory nets out to something that looks like a fly or a short straddle in the front month and some number of put and call backspreads in a deferred month(s). To take advantage of an increase in vol to add a position, assume that today the underlying falls and vol ramps. I would then look at your position and see whether your risk tolerance would accept a short vol trade. Might be in the front month if there's plenty of time to expiry, but if not, then in the next month out. Let's say you're 3 wks from expiry and spx drops 20 handles but vix ramps from 20 to 25. I'd look to add a short straddle in the front month. Not too many of them, because you don't want to outstrip the protection of the upside gamma in your put backspreads. The addition of the straddle is not a "special" trade because you're going to need those short contracts at sometime during the next few days or weeks anyway, since your book is perpetual. You're just taking advantage of the opportunity as it unfolded for you today. You don't want to add the backspreads on a day like this. You'll be looking to buy your long vega on a day that vol retreats.
None of the above addresses looking at your delta risks. You've still got to play that as you would normally, either with options or the underlying.
