Quote from atticus:
If it's a narrow book (only XYZ positions as stated) I would probably trade the put fly and the call calendar, so dissection is easier if you're running the positions for the first time. No, long gamma on the index fly; tight strikes to keep gamma relatively light.
I would look to be close to flat gamma, netted. The position would be long a bit of theta and vega. Risk would be somewhat isolated to correlation. You could trade the spot-spread. Long XYZ, short index futures, say half your initial deltas.
Short gamma in XYZ, long gamma in index, long the XYZ/index switch (short pseudo-dispersion). Net long gamma/theta/vega, but marginal on all. Correlation risk.
I think atty may be referring to OTM put FLY and OTM calendar set up to be delta neutral at the opening. Assuming his first paragraph of "and" meant both at the same time. You can use ToS analyzer to play around with strikes until you get a neutral range set up around atm spot price.
