Iron Condor Strategy: How It Works, With a Real SPY Trade

SPDR S&P 500 ETF (SPY)Closed at $759.97 on 23 October 2026

• Buy$710 putat $3.02
• Sell$720 putat $3.76
• Sell$790 callat $2.17
• Buy$800 callat $0.94

Net credit

$197

Most you can lose

$803

Breakevens

$718.03 · $791.97

Delta of each short strike

0.16

Return on the money at risk

24.5%

Margin held (Reg T)

$1,000

Margin is one spread's width, because SPY can't end below $710 and above $800 at once; the $197 you receive covers part of it. Filled at the midpoints the credit would have been $205.50. No SPY ex-dividend date falls before 20 November, but a Fed decision does, on 28 October.

Where does SPY close on 20 November?

At expiry With 14 days left

Falls to $700 Falls to $730 Unchanged Rises to $785 Rises to $805

SPY on 20 November

$759.97

At expiry

Profit or loss at expiry+$197all four options expire worthless

On the $803 at risk+24.5%SPY 0.0% from $759.97

SPY is between the short strikes, so you keep the whole $197.

The two weeks line uses each option's implied volatility at the 23 October close and assumes it doesn't change. It shows why many traders don't wait for expiry: with SPY unchanged the condor is already up about $109, more than half the credit, and the last two weeks add $88 while a move to either short strike now costs far more than it would at expiry.

Delta doubles as a rough chance of an option ending in the money, so one minus the two short deltas is a rough chance that both expire worthless. Every row is a trade-off, not a bargain: the 0.10 condor keeps its $92 about 4 times in 5 but risks $908 to do it, so one full loss wipes out about ten wins. At 0.16 you need about four full wins for each full loss. Notice the put sits further from the price than the call at the same delta. Puts are priced for sharper falls than rises, which is why most condors end up lopsided.

The breakevens barely move, and the return on what you risk falls as the wings widen. Two $5 condors pay $214 against $197 for one $10 condor with almost the same $786 at risk, though they mean eight fills instead of four. Pick the width from the loss you can take on a bad month, then size the number of condors from that.

Time decay speeds up near expiry, so the 28-day condor earns the most per day, and it also reacts hardest when SPY moves. The December condor gives SPY a range about 40% wider for the same money and more time for things to go wrong. That's the reason behind the common habit of opening 30 to 45 days out and closing well before the last week. The monthly expiries also carry far more open interest than the weeklies, which usually means tighter prices when you want out.

Early assignment is rare while an option still has time value, because the holder gets more by selling it. The exception is a short call that's in the money the day before SPY goes ex-dividend, which happens each quarter; the next one comes after 20 November. If a short leg is assigned, your long option on that side still caps the loss, but closing the spread early is simpler than handling the shares.

The condor index did what it promises: small, steady results. It rose in 147 of the 226 months since 2008, and lost only 4.0% in 2008 when the S&P 500 lost 36.8%. But the average down month (−2.0%) was bigger than the average up month (+1.2%), and over ten years that left almost nothing: less than the 2.4% a year one-month Treasury bills paid. The butterfly, which sells at the money, lost money. The index holds every condor to expiry and trades straight through every Fed meeting and crash. Taking profits early and skipping big events changes the result, which is why it pays to track what your own condors earn.

The condor is a strangle with insurance. The $396 it gives up to the wings is what turns an open-ended loss into $803, and it's why brokers hold $1,000 of margin instead of the far larger sum a naked strangle needs. A put credit spread on its own suits a view that SPY won't fall, much like a cash-secured put with a floor under it; the condor adds a call spread for a view that it won't rise much either. Price any of these with your own strikes in the options payoff calculator.

Underlying	Exercise and settlement	Size	US tax on the result
SPYETF options	American-style, can be exercised any day; settles in shares	100 shares of SPY, about $76,000 of exposure per contract	Capital gain or loss, short-term when held a year or less
SPXS&P 500 index options	European-style, exercised only at expiry; settles in cash	100 times the index, about ten times one SPY contract	Section 1256: 60% long-term, 40% short-term, marked to market at year end
A single stock	American-style; settles in shares	100 shares of the stock	As SPY; earnings reports can jump a stock past both wings overnight

The legs of a condor offset each other, so the straddle rules can apply: closing one side at a loss while the other side shows a gain can defer the loss. Other countries have their own rules.

1. Reading the win rate and not the loss

   A condor that keeps its credit two times in three can still lose money, because one full loss is four times the credit. What matters is how much you keep on the wins and how often you take a full hit.

2. Holding to the last day

   The final week brings little extra credit and the biggest swings in value near the short strikes. A close between a short and long strike also hands you shares on Monday.

3. Selling across a big event

   Earnings for a stock, or a Fed decision or inflation report for the index, can move the price past a wing in a day. The extra premium before an event is the market pricing that move.

4. Trading at the midpoint in your head

   Four legs means four bid-ask spreads. The SPY example paid $197 at the bid and ask and $205.50 at the midpoints; on a thinly traded stock the gap is far wider.

5. Doubling up after a loss

   Opening more condors to win back a full loss raises the size of the next one. Size each trade from the most you can lose, not the credit.