Something that may be useful to yourself and others is a
script to calculate Gamma exposure. Below are charts that I pulled for Tesla yesterday. This is a concept I am trying to learn more about, but basically it gives you a potential data point on how market makers (MM) are hedged against their options exposure. I won't go into detail here, but if you are interested this
link is a decent primer from the same author.
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The above are outputs of the script. I'd love to hear from someone who understands this better than I as we are sitting on top of a possible
gamma flip to negative gamma which could create an increase in volatility. Something to watch out for in Monday's trading.
This is in fact showing the same calculation as what the spotgamma service provides, that some may be familiar with. This is good analysis, but there is a huge caveat. The reason is actually called out in the article itself:
A crude approximation is that the dealers are long the calls and short the puts, which is true to some expend on an index level. For single-stocks, it’s more debatable, as the street can be short the calls due to some speculative buying frenzy.
*cough* Tesla *cough*
This assumption that dealers are long the calls and short the puts (i.e. retail, hedge funds, etc., are long puts and write covered calls mostly) and the dealers actively hedge against the stock moves, works pretty well at the index levels. But is somewhat flakey for individual names. It definitely was the case that the individual investors were trying to get Tesla exposure back in the day via long atm / otm calls.
As a counter point though, the stock is mostly under the influence of puts, and not calls. and I suspect that the folks long these puts are not dealers, leaving the dealers short put gamma. So this analysis is perhaps more applicable than in the past.
I am generally of the opinion that in case of Tesla, the dealers are short both puts and calls. This results in negative gamma position pretty much everywhere. The way this manifests itself is that moves in any direction are exacerbated. So despite its large market cap, Tesla is more volatile than most of its peers (in mcap terms).
There is some useful stuff though. It is worth tracking where max gamma is. generally these act as support / resistance levels due to hedging activity. and are also potential pins when options expire. Again this has to be tempered by the fact that this number changes intraday, with bought and sold options. In fact, with a high options volume name like Tesla, much is obscured by these 2 factors: Who is owning the puts and calls? and what are the intraday directional impacts from the huge options trading volume.
But despite that there is a small signal in that noise somewhere, i.e., key gamma strikes.