In creating prices, OCC will start by taking the mid-point of the highest bid and lowest ask price across all listing exchanges, determining the implied volatility and then smoothing that implied volatility curve (for a given option class, type and expiration) through an iterative process which, in turn, adjusts the option mark prices. There are also rules enforced to cap volatility for certain deep in and deep out-of-the-money options. The resultant edited price is extended out to six decimal places. Due to the operational overhead of computing edited prices for the complete universe of option series, this process is performed only once per day as of the market close.
So it actually turns out we were all wrong. They smooth a volatility curve they derive from the NBBO midpoint. So they are marking off volatility - not price.
Not what I grew up with.
So it actually turns out we were all wrong. They smooth a volatility curve they derive from the NBBO midpoint. So they are marking off volatility - not price.
Not what I grew up with.
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