The standard regulatory cut-off for exercise decisions on expiring standardized equity options is 5:30 p.m. ET on expiration day. In-the-money contracts are exercised automatically through the OCC's Ex-by-Ex process unless you file a Contrary Exercise Advice. Your broker likely enforces an earlier internal deadline, so check it before the final session.
TL;DR:
- Your broker’s exercise cutoff may precede the 5:30 p.m. ET regulatory deadline, so confirm its exact time and CEA submission method before expiration.
- For contracts with AM settlement, trading ends on the prior business day; contracts with PM settlement can trade through the regular session close.
- In the money equity options are automatically exercised unless you file a Contrary Exercise Advice; call holders need purchase cash, while writers must deliver shares.
Table of Contents
- Which expiration types will you actually trade?
- What does the official exercise cut-off say?
- Why do broker cutoffs matter more than the rule?
- How do holidays and early closes move the deadline?
- Does settlement style change your risk at expiration?
- What should your pre-expiry checklist look like?
- How do we build expiry checks into our briefings?
- How does time to expiry affect option prices and the Greeks?
- What does time decay (theta) do as expiry approaches?
- How does time to expiry influence volatility and implied volatility?
- Which strategies fit long-dated and short-dated options?
- How do liquidity and bid-ask spreads change near expiry?
- What expiry timing mistakes should you avoid?
- What do we think matters most about expiry rules?
- Want expiry-aware briefings before the open?
- FAQ
- Sources
Which expiration types will you actually trade?
Standard monthly options expire on a set date each month. Weekly options add more dates, and on many popular products, expirations are listed for nearly every trading day. A same-day-expiration contract is one whose expiration is today, so every decision about it is a cut-off decision.
The timing of the final settlement matters just as much as the date. A PM expiration settles on the closing price at the end of the regular session, which is how most equity options work. An AM expiration settles on an opening value calculated from the first trades of the expiration morning, which means the contract stops trading the day before. CME Group's explanation of AM and PM expirations is a good reference for futures options, and the same logic applies elsewhere.
Here is why it changes your behavior. If you hold an AM-settled contract, your last chance to trade out is the prior afternoon, so waiting for expiration day means you have no control over the result. With a PM-settled contract, you can trade until the bell, but you still face the exercise deadline afterward. Confirm which type you hold before you plan anything else.
What does the official exercise cut-off say?
FINRA's rule text sets a 5:30 p.m. Eastern Time exercise cut-off for expiring standardized equity options and describes the Ex-by-Ex automatic exercise process along with the Contrary Exercise Advice mechanism. Exchange rule language, such as Nasdaq's filing, repeats the same cut-off and notes a later submission window for certain firms using electronic time stamps.
Under OCC Rule 805, you have two choices at expiration:
- Do nothing and let Ex-by-Ex decide. In-the-money contracts above the specified threshold are exercised automatically.
- File a Contrary Exercise Advice (CEA) to exercise an option that would not be exercised automatically, or to prevent exercise of one that would.
- Remember that exchanges may announce a modified close, which moves the deadline.
FINRA states that automatic exercise triggers at expiration for all in-the-money standardized equity options unless a Contrary Exercise Advice is filed, and the cost of any resulting call exercise is due at that time.
The consequences are concrete. A call holder who is auto-exercised must fund the share purchase. A writer faces assignment and must deliver. Cash-settled products settle in cash instead.
Why do broker cutoffs matter more than the rule?
FINRA is blunt about this: member firms must make sure customers know their broker's specific exercise cut-off times, and you should not assume the regulatory 5:30 p.m. ET deadline is your broker's window. Firms may set an earlier time to accept instructions, but they may not accept instructions after 5:30 p.m. ET, as FINRA's notice reminds members. Processing time and manual workflows are the usual reasons for the gap.
The CEA workflow also varies by account type and firm. Some firms accept electronic CEAs late into the window, while others require a phone call to a desk well before it. Before an expiry you care about, run through these checks:
- Read your brokerage agreement for the exact exercise and CEA cut-off times.
- Confirm whether your broker time-stamps electronic instructions.
- Verify that you have the cash for a call exercise or the shares for a put exercise.
- Test the CEA process on a small position before a critical expiry.
Pro Tip: Ask your broker's support team for the cutoff in writing, then save it next to your trade journal so you never rely on memory on expiration day.
How do holidays and early closes move the deadline?
When an exchange announces a modified close of trading, the regulatory deadline shifts to 1 hour 30 minutes after that announced close. FINRA's 2025 information notice gives the example of a 1:00 p.m. ET close producing a 2:30 p.m. ET deadline, and the 2024 notice repeats the same method for that year's early-close schedule.
Work it out in order:
- Find the announced close time in the exchange holiday notice or the FINRA advisory.
- Add 1 hour 30 minutes to that time.
- Subtract your broker's internal buffer, since it will not be the same as the regulatory deadline.
- Set an alert for that adjusted time and file any CEA before it.
For example, a 1:00 p.m. ET close gives a 2:30 p.m. ET regulatory deadline. A 12:00 p.m. ET close would give 1:30 p.m. ET. A common pitfall is relying on the standard 5:30 p.m. time. FINRA's holiday notice stresses that traders miscalculate these dates when they use the normal schedule instead of the exchange notice.
Does settlement style change your risk at expiration?
Yes, a lot. Equity options are physically settled, so exercise means shares change hands. Many index options are cash-settled, so you receive or pay the difference in cash and nobody delivers anything.
Exercise style matters too. American-style options can be exercised any time before expiration, which creates early assignment risk for writers. European-style options can only be exercised at expiration. Cash-settled European-style contracts, such as those described in Cboe's S&P 500 weekly options specifications, eliminate early assignment risk for writers.
Plan your funding accordingly. With physically settled calls, keep enough cash to buy the shares or close the position first. With short puts, be ready to take delivery. With cash-settled index options, you need no share funding, but you still need to know the settlement value convention. Our guide on avoiding assignment on ex-dividend options covers the early assignment side in more detail.
What should your pre-expiry checklist look like?
Run these steps in order of urgency during the final trading day:
- Check your broker's exercise cutoff first, then compare it with any modified close announced by the exchange.
- Confirm whether each position is in the money or out of the money against the current underlying price.
- Make sure the cash or shares are in the account for any exercise or assignment.
- File a CEA or Advice Cancel when you want a different outcome than Ex-by-Ex would give.
- Cancel conflicting contingent orders so they do not fire after your decision.
- Watch exchange notices for changes to the close.
Start with in-the-money positions, since they carry the automatic exercise consequences. Funding comes second, and a CEA third. Our options entry rules checklist and the piece on turning entry and exit rules into orders fit well beside this list.
Pro Tip: For 0DTE positions, use time-stamped electronic CEAs and set recurring alerts for your broker cutoff, not the regulatory one.
How do we build expiry checks into our briefings?
We design our daily briefings and scanners for options traders. A trade idea close to expiration calls for checking its contract date to determine whether it is a weekly, monthly or 0DTE setup. Confirm your broker's cutoff before you act. These are operational checks, not substitutes for your broker's rules, so always confirm the exact times with your broker.
How does time to expiry affect option prices and the Greeks?
An option's price has two parts: intrinsic value and time value. Intrinsic value is how far the option is in the money. Time value is what the market pays for the chance that things move in your favor before expiration. More time means more time value, and as expiration approaches, time value shrinks toward zero.
The Greeks change as expiry nears. Delta for at-the-money options can stay near the midpoint for a while, but close to expiration it becomes more sensitive to small price moves, moving toward its upper or lower bound as the option settles into or out of the money. Gamma, which measures how fast delta changes, rises sharply for at-the-money contracts near expiry, so small moves in the underlying produce large swings in your position. Vega, the sensitivity to implied volatility, falls as expiry approaches because there is less time for volatility to matter.
Theta, the daily time decay, grows in importance for short-dated options. Rho, the sensitivity to interest rates, is small for short-dated contracts and matters more for long-dated ones. The practical lesson is that the same option behaves like a very different instrument depending on how much time remains. A contract with months to go moves slowly and forgives mistakes. A contract with hours left can lose most of its value on a modest move against you.
What does time decay (theta) do as expiry approaches?
Theta is not linear. It accelerates as expiration nears, especially for at-the-money options, because there is less time left for the underlying to make a meaningful move. An option with several weeks left loses time value gradually. In the final days it can lose a large share of what is left each session.
This cuts in different directions depending on your position. Buyers fight decay: the underlying must move enough, quickly enough, to outrun the daily loss. Sellers collect decay, but they take on gamma risk, since a small adverse move late in the cycle can wipe out many days of collected premium.
Out-of-the-money options decay differently. Their value is nearly all time value, so it can fade to zero if the underlying does not move toward the strike. In-the-money options hold their intrinsic value, so the time value falls away while the rest remains.
A few habits follow. Do not buy short-dated options and hope for a slow grind, since decay will take its share while you wait. If you hold a long position into the last week, decide in advance at what price or time you will exit rather than letting decay make the decision. Our article on the best time to trade options also helps when you are deciding when in the session to act.
How does time to expiry influence volatility and implied volatility?
Implied volatility (IV) is the market's estimate of future movement, built into the option's price. Different expirations on the same underlying often show different IV, which traders describe as the term structure of volatility. When an event such as an earnings report falls before a given expiration, the options expiring after the event usually carry higher IV than those expiring before it, since they include the uncertainty the event brings.
Time also changes how IV affects price. Longer-dated options are more sensitive to IV changes, which is the vega effect described above. Short-dated options respond more to the underlying's price and to decay than to shifts in IV.
IV often drops sharply after a known event passes, a pattern traders call volatility crush. A buyer who bought ahead of earnings can be right on direction and still lose money, since the fall in IV removes value from the option. Near expiration, IV readings can also become noisy, since tiny price changes in cheap options translate to large swings in implied numbers.
The takeaway is to compare IV across expirations before choosing one. If you want exposure to an event, check how much of the event is already priced into each date. If you are selling premium, higher IV in a given expiration pays you more, but it also reflects real risk.
Which strategies fit long-dated and short-dated options?
Long-dated options suit traders who want exposure to a thesis that needs time to play out. Buying calls or puts several months out gives the trade room to breathe, with slower decay and less sensitivity to a single bad day. Long-dated contracts can also stand in for stock, with a smaller capital outlay, though they carry decay and require a larger move to profit than the premium might suggest.
Short-dated options suit traders with a precise, near-term view. Weeklies and 0DTE contracts work for scheduled catalysts and tight intraday setups. They are cheap and highly responsive, but they demand discipline, since decay and gamma are working at full speed.
For income strategies, sellers often prefer the weeks with the steepest decay, trading shorter-dated covered calls or cash-secured puts and rolling them as expiration nears. Spreads help here: defined-risk structures cap the damage when gamma bites late in the cycle.
Whatever you choose, match the holding period to the expiration. A thesis that needs several weeks should not be expressed with a contract that expires in just a few days. Write down the date by which you expect to be right, then choose an expiration beyond it, with some cushion.
How do liquidity and bid-ask spreads change near expiry?
Liquidity concentrates around certain expirations and strikes. Monthly and heavily traded weekly expirations on popular underlyings usually have tight bid-ask spreads and plenty of volume. Far-dated and unusual expirations often have wider spreads, which raises your cost to enter and exit.
Near expiration, the picture gets more nuanced. At-the-money contracts for liquid products can trade actively right up to the close. Deep in-the-money or far out-of-the-money contracts, by contrast, can have thin markets with little depth, so quoted prices may not reflect what you can actually get.
Wide spreads cost you twice, once in and once out. A contract quoted at a wide spread needs to move in your favor just to break even after you cross it. Use limit orders, check the spread as a percentage of the option's price, and avoid market orders in thin contracts.
During the last hour of trading, quotes can move quickly and market makers may widen spreads to protect themselves, so what you see on screen may not be what you get. Closing a position earlier in the session, when liquidity is deeper, often costs less than waiting for the final minutes. If a position is hard to exit, it may be wiser to avoid holding it into the final day at all.
What expiry timing mistakes should you avoid?
Most expiry mistakes come down to assuming instead of checking. These are the ones we see most often:
- Relying on the 5:30 p.m. rule. Your broker's cutoff is often earlier, and FINRA says plainly that you should not assume the regulatory deadline is your broker's window.
- Ignoring holiday schedules. Early closes move the deadline, and the standard time no longer applies.
- Holding in-the-money options by accident. Automatic exercise can leave you with shares you cannot afford or a short position you did not want.
- Forgetting about funding. A call exercised without cash in the account can turn into a margin problem fast.
- Leaving conflicting orders open. A stale stop or limit order can trigger against a decision you already made.
- Confusing AM and PM settlement. Missing the last trading day for an AM-settled contract leaves the outcome out of your hands.
- Ignoring pin risk. When the underlying closes right at your strike, you may not know until after hours whether you were assigned. Our guide on pre-market trading from BigMove is a useful reminder that price action outside regular hours can change the picture before the next open.
What do we think matters most about expiry rules?
The conventional advice is to memorize the 5:30 p.m. deadline. We think that is the least useful number on the page. The regulatory time sets an outer boundary, but the number that actually governs your outcome is the one your broker enforces, and most traders have never looked it up.
The second thing we think is overrated is the idea that expiration day is where the risk lives. The research and the regulatory notices point the other way: the damage usually comes from decisions made, or not made, in the days beforehand. Positions that sit in the money without a plan, funding that was never checked and holiday dates that were never calculated all start earlier than the final session.
So here is the order we would work in. First, find your broker's cutoff and write it down. Second, decide for every open position whether you want it exercised, closed or left to expire, and do it before the last day. Third, treat the regulatory deadline as a backstop, never as a plan. A checklist you run every cycle will beat any amount of rule memorization on a busy expiration morning.
— Customer
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FAQ
Is the expiration date the last day you can use an option?
For most equity options, expiration day is the last day to trade the contract, but the last time to act on it is earlier. The regulatory exercise decision deadline is 5:30 p.m. ET, and many brokers set an earlier internal cutoff, so confirm yours.
Do options expire at 4 p.m. or 8 p.m.?
Standard equity options stop trading at the close of regular trading. The exercise decision deadline runs later, to 5:30 p.m. ET under the exchange rules, and your broker may cut off sooner. There is no single standard evening deadline.
Does the expiry date include the day itself?
Yes. The contract stays live through expiration day, and the final exercise decision happens on that day. For AM-settled products, trading ends the prior business day, so the settlement price comes from the expiration morning.
What is the time period of expiry?
Listed options have varying expiration periods, depending on the product. Weekly options have shorter expiration periods, monthly options expire on a set date each month, and long-dated contracts can have much longer expiration periods. Check the contract specifications for the exact date.
Sources
- Finra
- Finra
- Notice of Filing and Immediate Effectiveness of a Proposed Rule Change Relating to Options Exercise Procedures