Markets · SPX

SPX 0DTE gamma: today's expiry, on its own

Most of SPX's volume is in same-day options, and their gamma behaves differently from the rest of the book. Zanshin Flow lets you see today's expiry on its own, each of the next three, or all of them together.

SPX 0DTE absolute gamma in ES prices beside the charm surface in Zanshin Flow — SPX 0DTE gamma in ES prices, beside the charm surface: where time decay forces dealers to buy and sell.

Why split out 0DTE

Same-day gamma is concentrated near the money and grows sharply into the afternoon, then disappears at the close. Mixed in with longer expiries it gets blurred; on its own you see which strikes today's book really pins to. Zanshin Flow shows 0DTE, each of the next three expiries, all of them combined (weighted by how spread out each one's gamma is), or any mix you pick.

What you see

0DTE gamma by strike under price, live, with walls, the flip and the strikes that have been brightest for an hour or more.
Charm: the hedging time decay forces, strongest in the last hour or two.
The options tape and dealer hedging flow, all expiries or 0DTE only.
In ES prices, with a live basis, if you trade the futures.

More on how same-day options work: 0DTE options explained.

What it isn't

0DTE walls weaken late in the day as their gamma decays. Context, not signals.

Questions

Where can I see SPX 0DTE gamma exposure?

Zanshin Flow shows SPX gamma for today's expiry on its own, live, alongside the next three expiries and all expiries combined. $15 a month after a 3-market-day free trial.

Why does 0DTE gamma matter?

Same-day options carry most of SPX's volume, and their gamma is concentrated near the money and grows into the afternoon, so today's expiry often decides where price pins or breaks.

Can I see SPX 0DTE levels on ES futures?

Yes. Every SPX level can be shown in ES prices with a live basis.

Not financial advice. Zanshin Flow is an analytics tool; nothing on it is a recommendation to buy or sell anything.