Does anyone know this letter? Does it exit also in IB?

Quote from tabasco mark:

I don't deal with wheat or bean calls..
only spider options,
Nothing unusual happened with my positions
they were not bigger than usual
that's why I was surprised .
atticus -I might use wings or ..
oldnemesis, I liked this link
http://quant.stackexchange.com/ques...-be-short-gamma
sle - I was considering voting with my feet but I
spoke with the head of the Margin desk and he was very
compliant and he explained to me that it was the
Demand of the Bank they work with to reduce
their exposure to risk .
He was nice but I wasn't convinced by this explanation
this is why I raised the question in order to see
if anyone else received this Email and to try and
get some ideas about the meaning of it .
More...

Variation margin can be enormous when you're short OTM gamma. lol you could tell them about sticky delta, but they're not going to listen. There are many scenarios you can implement to sell skew w/o resorting to selling naked puts (or calls if ITM).

And yes, vote with your feet and head to IB, but they will liquidate you if you go on call on vola or price, and before you can work the order. You can't be blown out of a spread that's 1:1 or better. I never sell speed (otm gamma) and only sell naked in LEAPS straddles.
 
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