Which Options Expire on Each Weekday
A weekday by weekday map of options expirations: what expires Monday through Friday, and how to check any chain yourself for a weekday you do not see listed.
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When Do SPX Options Stop Trading?
SPX options stop trading on two clocks: the AM settled monthly ends its session on Thursday, while SPXW weeklies run into Friday. Both cutoffs, with data.
What Is the Gamma Flip Level?
The gamma flip level is the price where estimated dealer gamma crosses zero. How it is built from strike gamma and open interest, and how to check one.
SPX Options vs ES Futures Options: Which to Use
SPX options vs ES futures options, side by side: $100 vs $50 a point, cash vs futures settlement, SPAN 2 vs Reg T margin, 23-hour sessions and 60/40 tax.
Are 0DTE Options High Risk? What the Greeks Say
Are 0DTE options high risk? Gamma and theta per dollar of premium for a same-day SPY contract versus a month-out one, and how far SPY must move to double it.
AM vs PM Settled Index Options Explained
AM settled index options settle off Friday's opening quotation and stop trading Thursday. PM settled options run to the close. The gap between them, measured.