Why Open Interest Updates Only Once a Day
Open interest updates once a day, after overnight clearing. See why the OI column you read at noon is yesterday's number, and what volume shows instead.
#open interest
Filtering by topic #open interest · clear
What Is Max Pain in Options? The Real Math
Max pain is the strike where option holders collect the least at expiry. See the calculation on a real SPY chain and how close settlement actually landed.
Options Volume vs. Open Interest, Explained
Volume counts contracts traded today; open interest counts contracts still outstanding. Both defined, plus one full day of the US options tape, measured.