June 20, 2026 was one of the highest-volume trading days of the year. Quarterly options expiration, also called quadruple witching, combined with quarter-end institutional rebalancing to push S&P 500 volume well above its daily average in the final hour of trading. If you had open options positions heading into that Friday, here is what to check and do now that the dust has settled.
- Q2 2026 quarterly options expiration (opex) was Friday, June 20, 2026, coinciding with quarter-end institutional rebalancing flows.
- SPX index options settled to the opening SOQ print on Friday morning; SPY ETF options settled to Friday’s closing price. These are different numbers.
- Any short options that expired in-the-money were automatically exercised. Check your account for surprise assignments.
- Calendar and diagonal spreads that used June as the short leg now have one leg remaining; the next decision is whether to roll or close.
- Q3 2026 quarterly opex is September 19, 2026. The roll window for new positions opens in early to mid-August.
What Made June 20 Different from a Typical Weekly Expiration
Four distinct categories of derivatives expired simultaneously on June 20: S&P 500 index options, S&P 500 index futures, single-stock options, and single-stock futures. This quarterly convergence creates larger-than-usual market-maker hedging flows, especially in the closing auction.
Quarter-end added a second layer of volume. Institutional funds, pension plans, and target-date retirement accounts rebalance their portfolios at the end of each calendar quarter. In Q2 2026, the S&P 500 had recovered meaningfully from the April tariff lows, meaning equity-heavy portfolios needed to trim equities and add bonds to restore their target allocations. Much of that rebalancing concentrated into the June 20 closing auction.
The practical result: the last 30 minutes of trading on June 20 saw elevated SPX volatility and unusual intraday price swings that had nothing to do with company fundamentals or economic data. If your iron condors or short strangles were challenged near the close, institutional rebalancing flows were likely a contributing factor.
The SPX vs SPY Settlement Difference
This distinction catches traders off guard every quarter. SPX index options settle to a special opening quotation (SOQ) calculated from Friday morning’s opening prices, not from Thursday’s close or Friday’s close. The SOQ is typically published by CBOE before 9:30 AM ET on the third Friday of March, June, September, and December.
SPY ETF options settle to Friday’s actual closing price. If SPX and SPY moved in opposite directions between Friday’s open and close, a position that appeared safe at Thursday’s close may have been assigned based on the Friday SOQ, while a similar SPY position was fine based on the close.
If you held short SPX strikes through June 20 expiration and are unsure about settlement, check the CBOE website for the published SOQ value. IBKR, tastytrade, and Schwab/thinkorswim all display the settlement price in account activity or position detail. For a fuller breakdown of why these settlement differences exist and how they affect tax treatment, see our guide to SPX vs SPY options differences.
Post-Opex Position Checklist
Work through these steps before placing any new trades this week.
Step 1: Confirm Your Current Position Statement
Log in to your brokerage and pull your current position statement. Check for:
- Assigned stock: If you were short a put at or below the stock price at expiration, you may have been assigned 100 shares of stock per contract. This settles Tuesday for Friday-expiration options.
- Exercised calls: If you held long calls that expired in-the-money, they were automatically exercised and you now own shares at the strike price.
- Fully closed positions: Any spreads where both legs expired out-of-the-money closed at zero. No action needed. Max profit captured.
Step 2: Handle Unexpected Assignments
The most common post-opex surprise: a short put that expired very close to the strike price, and the stock moved slightly below it in after-hours trading on Friday or during Saturday options processing. OCC processes assignment notices after Friday’s close, so a stock trading $0.02 below your strike at 4:00 PM Friday can result in assignment over the weekend.
If you were assigned on a cash-secured put and own shares you did not plan to hold, you have a few options:
- Sell the shares Monday morning if you do not want the position.
- Transition to a covered call on those shares to collect premium while holding, starting the wheel strategy.
- Hold the shares if they represent a company you would want to own at that price.
An assignment is not inherently a loss. If your strike was your intended buy price for the stock, assignment is the strategy working as designed. For a full breakdown of how assignment works and when to expect it, see our guide to options assignment explained.
Step 3: Check Spreads for One Surviving Leg
Credit spreads where one leg expired in-the-money and the other expired worthless require attention. A short put spread where the short put was assigned but the long put expired worthless leaves you with stock assignment and no hedge. Both legs should have been exercised or closed together.
If you notice a spread where one leg was exercised and the other expired worthless, contact your broker immediately. This situation can result in significant unintended directional exposure beyond the original defined-risk structure of the spread.
Step 4: Address Calendar and Diagonal Legs
June was a common front-month expiration for calendar spreads and diagonal spreads. If you were running a calendar where you sold June options against long September or December options, the short June leg has now expired. You hold the back-month position with no hedge.
For calendar spreads where the underlying is still near your original target: sell a new front-month option against the surviving long position to continue collecting theta. Typically this means selling a July or August expiration. If the underlying has moved significantly away from the center of your calendar, evaluate whether to close the remaining long option and redeploy fresh, or adjust the strike before re-selling. Our calendar spread guide covers roll decisions in detail.
Step 5: Update Your Trade Log
Options assigned at expiration are treated differently from options sold before expiration for wash-sale rule purposes. If you incurred losses on options that expired worthless, and you repurchase substantially identical options within 30 days, those losses may be deferred. Record the opex outcomes in your trade log before placing new positions in the same underlying.
Pin Risk: The Quarterly Opex Hazard
Stocks and ETFs often pin near large open interest strikes around expiration. Market makers who have sold a large number of calls at a specific strike must buy shares to delta-hedge as the underlying approaches that level, which can temporarily push the price toward the strike. As positions settle, the buying pressure releases.
Pin risk is most pronounced at quarterly expirations because the concentration of open interest is highest. A stock pinned at $200 at 3:59 PM Friday might have hundreds of thousands of contracts expiring at or near ATM, creating maximum uncertainty about whether those options are exercised. If you were short a put at a strike where significant open interest was concentrated, your assignment result may have depended on after-hours pricing rather than anything visible in the regular Friday session.
The practical lesson for Q3: track open interest at your short strikes a few days before expiration. If you are short a strike that carries significantly more OI than adjacent strikes, that strike is a candidate for pinning behavior, and the expiration outcome is less predictable than for a strike with thin OI on both sides. The options expiration week guide covers specific tactics for managing these high-OI strikes in the days before expiration.
Gamma Risk at Quarterly Opex: The 21-DTE Lesson
Options near expiration have very high gamma, meaning their delta changes rapidly with every point of underlying movement. At quarterly opex, this gamma risk is amplified by the sheer volume of open interest expiring simultaneously. A position with strikes that appeared safe on Thursday morning can become challenged within minutes on Friday if a large institutional order hits near your strike.
Experienced traders apply the 21-day exit rule: closing short options at 21 days to expiration specifically avoids this zone of elevated gamma risk. If you held positions through opex and experienced unexpected stress, consider whether setting a 21-DTE exit trigger prevents a repeat in Q3. Our guide to the 21-DTE exit rule and 50% profit target covers the research behind this approach.
Looking Ahead: Q3 2026 Opex on September 19
The next quarterly expiration is September 19, 2026. That gives traders about 13 weeks to set up and manage positions through the summer.
Several patterns are worth noting for Q3 2026:
- Lower summer IV: June, July, and August historically see lower implied volatility than Q4 and Q1. Iron condors and credit spreads collect less premium for the same strike distance during this period. The right adaptation is to size down rather than push strikes closer to collect the same dollar credit.
- August Jackson Hole: The Federal Reserve’s annual Jackson Hole Economic Symposium, typically in late August, can create a mini-FOMC event for SPX. With Kevin Warsh now as Fed Chair, market sensitivity to forward guidance language is elevated after the June 17 sell-off. Watch for IV inflation in late August SPX options ahead of that event.
- September opex timing: September options expiration on September 19 occurs two days after the September FOMC meeting (September 16-17, 2026). Two high-gamma events in the same week produce elevated volatility. The roll window for Q3 positions opens in early September, ahead of the FOMC date.
For premium sellers using defined-risk structures like iron condors, setting up Q3 positions in the 45-60 DTE window, around early August, gives adequate time premium collection well ahead of the September volatility cluster. For options-first platforms with built-in probability tools to evaluate Q3 setups, tastytrade shows the expected move and probability of profit directly on the options chain when selecting strikes.
Quarterly Opex vs Weekly Opex: The Key Structural Differences
| Factor | Weekly Opex | Quarterly Opex (Q2, June 20) |
|---|---|---|
| Instruments expiring | Single-stock options only | Index options, index futures, single-stock options, single-stock futures |
| Open interest concentration | Moderate | Very high (quarterly settlement concentrates OI) |
| SPX settlement type | PM-settled (Friday close) | AM-settled (Friday opening SOQ) |
| Institutional rebalancing | Minimal | Significant quarter-end flows in closing auction |
| Pin risk magnitude | Lower | Higher (more OI at each strike) |
Bottom Line
Q2 2026 opex on June 20 is behind you. Review your account for assignments, address any one-legged spread situations from partial exercises, and decide whether to roll or close calendar structures that lost their short leg this week. For the next 13 weeks, Q3 opex on September 19 is the target, with the September FOMC meeting two days before it adding complexity in the final week. Setting up well-managed positions in early August with planned 21-DTE exit triggers avoids the last-minute gamma stress of holding through quarterly expiration day itself.
Frequently Asked Questions
Q: My short put expired with the stock at exactly my strike price. Am I assigned?
A: The OCC automatically exercises any option more than $0.01 in-the-money at expiration. If the stock closed at exactly your strike, the option expired worthless and you were not assigned. If the stock closed $0.01 below your strike on a put, you were likely assigned. After-hours trading on expiration Friday can push a borderline option into the money after the regular session close, resulting in a weekend assignment.
Q: I have a calendar spread where the short June leg expired. What should I do now?
A: Your surviving long option is now unhedged. It will continue to decay and carry directional exposure with no offsetting short to collect premium. The typical next step is selling a July or August option at the same or adjusted strike to reinstate the calendar structure. If the underlying has moved away from your original center, consider adjusting the strike or closing the long and re-entering fresh.
Q: What is the SOQ for SPX June 2026 expiration and how do I find it?
A: The SOQ for each quarterly expiration is published by CBOE on expiration morning, typically before 9:30 AM ET. Historical SOQ values are available on the CBOE website under Market Data. Your broker’s account activity also shows the settlement price for SPX contracts that expired on June 20.
Q: My iron condor had both wings intact through opex and expired worthless. Do I need to close it manually?
A: No. Options that expire fully out-of-the-money expire worthless automatically at zero cost. The position closes and the full credit collected at entry is retained as profit. Check your account statement to confirm the position closed and the credit was realized.
Q: When should I start setting up Q3 2026 opex positions?
A: For 45-DTE positions targeting September 19 expiration, the optimal entry window is around early August 2026 (August 4-7). For 30-DTE setups, the window opens around August 20. Entering too early means carrying positions through the August Jackson Hole event risk without collecting proportionally more premium for the additional holding period.
Keep learning: How options expiration works week-by-week covers the full mechanics of weekly, monthly, and quarterly expirations. For a breakdown of how SPX and SPY differ in settlement, taxes, and contract structure, see our SPX vs SPY comparison guide.