Mechanics · SPX 0DTE spreads · verified 2026-09-25
SPX 0DTE spread at expiration: the cash-settlement math (2026)
Both legs of an SPXW vertical cash-settle independently to intrinsic × 100 on the official 4:00pm ET closing value. A 7700/7710 call debit spread with the close at 7725 pays 25.00 × 100 on the long leg and owes 15.00 × 100 on the short leg: net $1,000, full width. No shares, no assignment, no pin risk between the strikes.
Instrument facts last verified 2026-09-25 · broker rows last verified 2026-09-25
Written and verified by the 0dteclose desk · methodology · corrections: corrections@0dteclose.com
Run it on your own position
See what 4:00 does to your SPX strike
Prefilled with a 7700 call bought at 2.40 — enter your own strike and price; the readout uses the 15-min delayed CBOE quote.
| Official SPX close | Long 7700 call (cash) | Short 7710 call (cash) | Net settlement | Net minus $420 debit | Source |
|---|---|---|---|---|---|
| 7690.00 — below both strikes | $0 | $0 | $0 | −$420 | arithmetic (intrinsic × 100 per leg) |
| 7700.00 — at the long strike | $0 | $0 | $0 | −$420 | arithmetic (intrinsic × 100 per leg) |
| 7705.00 — midway between the strikes | +$500 | $0 | +$500 | +$80 | arithmetic (intrinsic × 100 per leg) |
| 7710.00 — at the short strike | +$1,000 | $0 | +$1,000 | +$580 | arithmetic (intrinsic × 100 per leg) |
| 7725.00 — above both strikes | +$2,500 | −$1,500 | +$1,000 | +$580 | arithmetic (intrinsic × 100 per leg) |
| Settlement rule | Each leg is cash-settled on its own to intrinsic value × 100 on the official S&P 500 closing value at 4:00pm ET; the two amounts net in the account the next business day | www.cboe.com verified 2026-09-25 | |||
| Fact | Value | Source |
|---|---|---|
| Settlement | Cash, to the official S&P 500 closing value on expiration day (PM-settled SPXW) | www.cboe.com verified 2026-09-25 |
| Exercise style | European — exercisable only at expiration; no early assignment | www.cboe.com verified 2026-09-25 |
| Multiplier | 100 (intrinsic value × 100 per contract) | www.cboe.com verified 2026-09-25 |
| Last trade, expiring contract (ET) | 4:00pm ET (1:00pm ET on early-close sessions) | www.cboe.com verified 2026-09-25 |
| Auto-exercise threshold | Not applicable in the share sense — any in-the-money amount is settled in cash, no shares | www.cboe.com verified 2026-09-25 |
| OCC exercise-instruction cutoff | Not applicable — no exercise decision; the 4:00pm ET closing value is final | www.optionseducation.org verified 2026-09-25 |
| Exercise / settlement reference time | 4:00pm ET official closing value; OCC closing marks use the 4:00pm ET NBBO | www.cboe.com verified 2026-09-25 |
| Cash settlement posts | Next business day (T+1) | www.optionseducation.org verified 2026-09-25 |
How is each leg settled?
Separately, in cash, to the same number. At 4:00pm ET on expiration day the official S&P 500 closing value is fixed, and every SPXW contract in the money against that value is settled for intrinsic value × 100: a call pays closing value minus strike, a put pays strike minus closing value, and anything out of the money pays zero. A vertical spread is two contracts, so it gets two settlements — the long leg is credited, the short leg is debited — and the broker nets them into one cash line the next business day. Nothing links the legs at settlement; the net simply falls out of the arithmetic. With a 7700 long call and a 7710 short call, a 7725.00 close credits $2,500 and debits $1,500. The single-leg version of this math, and the 4:00pm ET stop in trading, are covered on what happens if my SPX 0DTE expires in the money.
What does the spread pay at closes inside, above and below the strikes?
The table above runs one 7700/7710 call debit spread, bought for 4.20 ($420), through five closes. Below both strikes, at 7690.00, both legs expire worthless: net $0, and the $420 debit is the whole result. At the long strike, 7700.00, the long call is exactly at the money and also pays $0. Midway, at 7705.00, the long leg is 5.00 in the money: $500 credited, the short leg expires worthless, and the account is +$80 after the debit. At the short strike, 7710.00, the long leg pays $1,000 and the short leg pays nothing. Above both, at 7725.00, the long leg pays $2,500, the short leg owes $1,500, and the net is still $1,000: width × 100 is the ceiling, whatever the close. The SPX simulator runs single-leg positions at seven closes from the 15-min delayed CBOE quote.
Why is there no pin risk on an SPX spread?
Pin risk is a physical-settlement problem, and SPXW has no physical settlement. On a SPY spread with the close sitting between or on the strikes, one leg is exercised automatically (in the money by $0.01 or more at the 4:00pm ET close) while the other may or may not be assigned — and that depends on what the holder of the short leg does before the exercise cutoff, after after-hours prices have moved. The result can be 100 shares per contract in the account overnight or over a weekend, long or short, with no offsetting leg. An SPXW spread cannot end that way. Both legs are marked against one closing value, both settle in cash, and there is nothing to exercise, nothing to assign, and no after-hours decision on either side. A close exactly on the short strike simply means the short leg pays $0. The broader contrast is on can you get assigned on SPX 0DTE?
What about an iron condor or a credit spread?
Same rule, sign reversed. Sell the 7700/7710 call spread for a 4.20 credit and $420 arrives when the trade opens; at settlement the short 7700 leg is debited and the long 7710 leg is credited. The largest settlement debit is the width, $1,000, so the largest net debit after the credit is width × 100 − credit = $1,000 − $420 = $580. Below 7700, both legs expire worthless and the $420 credit stays. An iron condor is a put credit spread and a call credit spread on the same expiration — say 7650/7640 puts and 7750/7760 calls for a combined 2.10 credit. One closing value cannot put both short strikes in the money, so at most one side settles against you: the maximum net debit is $1,000 − $210 = $790 per condor. Every leg is still cash-settled on its own, which is what keeps the condor arithmetic this simple.
When does the cash post?
The next business day. Settlement values for expiring SPXW contracts are fixed at the 4:00pm ET close, OCC settles the in-the-money contracts in cash, and the net amount reaches the account on the following business day — Monday for a Friday expiration, Tuesday when that Monday is a market holiday. Most brokers show the expiring spread as closed, with the pending settlement amount, the same evening, and buying power can look reduced until the cash posts, because the margin requirement on the spread stays in place until then. For a debit spread the requirement is the debit already paid; for a credit spread it is the width × 100 minus the credit, $580 in the example above. Nothing changes the amount after 4:00pm ET: there is no exercise window, no assignment notice to wait for, and no morning surprise. The per-broker tracker records each broker's cash-account settlement policy, dated.
What if the close is between my strikes by a few cents?
It settles to the official closing value, not to the last print you saw. The official S&P 500 closing value is computed from the closing prices of all 500 component stocks, and it can differ from the last index tick on a chart by a few cents. Take the 7700/7710 spread with a last print of 7709.98 and an official close of 7710.03: the short 7710 call is in the money by 0.03 and is debited $3, while the long leg is credited $1,003, net $1,000. Had the official value come in at 7709.98, the short leg pays $0 and the net is $998. Either way the difference is cents × 100, it is settled in cash, and there is no share position to discover the next morning. Our session archive records every close with its source field, dated.
Quick answers
How are SPX 0DTE spreads settled at expiration?
Each leg cash-settles on its own to intrinsic value × 100 on the official S&P 500 closing value at 4:00pm ET; the amounts net in the account the next business day.
What is the most a 10-wide SPX spread can pay at expiration?
The width × 100: $1,000. A 7700/7710 call spread with a 7725 close pays $2,500 on the long leg and owes $1,500 on the short leg, net $1,000.
Is there pin risk on an SPX spread?
No, not in the share sense. Both legs settle in cash to one closing value, so a close between or on the strikes cannot leave shares in the account the way a SPY spread can.
What is the maximum loss on an SPX credit spread held to expiration?
Width × 100 minus the credit received. A 10-wide spread sold for 4.20 has a maximum net settlement debit of $1,000 − $420 = $580.
When does SPX spread settlement cash show up?
The next business day. Most brokers show the pending amount the evening of expiration.
Does my SPX spread settle to the last price I saw?
No. It settles to the official S&P 500 closing value, which is computed from the 500 component closes and can differ from the last print by a few cents.
Related
- SPX simulator your strike at seven closes
- SPX expires ITM single-leg cash settlement
- Can you get assigned on SPX? European-style, cash-settled
- SPY expires ITM physical, where pin risk lives
- Missed the exercise cutoff? SPY/QQQ broker cutoffs
- Session archive every close, dated
- How much can you lose? max loss by position type
- Methodology sources and limits
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