Iron Condor Close at 50% Profit: DTE Optimization Guide

Closing an iron condor at 50% profit means buying the whole position back once it costs half the credit you collected. Sell a condor for $1.50 and you close it at $0.75, keeping $75 per contract. Traders do it because the second half of the credit takes a lot of risk to earn, and that risk grows in the last few weeks, when gamma climbs.

How long you wait depends mostly on entry DTE. In a simple Black-Scholes model with price and IV frozen, a condor with its short strikes at one expected move hit 50% roughly halfway through its life, so about three weeks for a 45 DTE entry and two weeks for a 30 DTE entry. Real trades rarely sit still like that, so treat those as a best-case clock.

Watch the short

What "close at 50% profit" means

An iron condor is a short put spread and a short call spread on the same underlying and expiration. You collect a credit for both. If the price finishes between the two short strikes at expiration, all four options expire worthless and you keep the full credit. That credit is your max profit.

The 50% rule says you don't wait for that. You buy the condor back when its price has fallen to half the credit.

Here's a hypothetical to make the arithmetic concrete. Say you sell a $5-wide iron condor for a $1.50 credit.

Max profit     = credit                 = $1.50 × 100 = $150
Max loss       = (width − credit) × 100 = ($5.00 − $1.50) × 100 = $350
50% target     = buy back at credit / 2 = $0.75
Profit at 50%  = ($1.50 − $0.75) × 100  = $75 (before commissions)

The simple way to run it is a good-till-cancelled buy order at the target price, placed right after the opening fill.

Then the exit doesn't depend on you watching the screen. Enter it as one four-leg order so the legs close together.

Why close at 50% instead of holding

The rest of the credit is a poor trade

Look at the same hypothetical condor at the moment it's worth $0.75.

If you hold to expiration:
  Best case  : condor expires worthless  → you make $0.75 more  = +$75
  Worst case : condor goes to full width → you lose $5.00 − $0.75 = −$425 from here

When you opened it, you were risking $350 to make $150. At the 50% mark, staying in means risking $425 to make $75. You can't close half the risk and keep the other half of the credit. Holding is, in effect, a new trade with worse terms than the one you opened.

That doesn't mean holding always loses. Plenty of condors that reach 50% would also have expired fine. The point is that the payoff for waiting is small next to what one bad move in the last weeks can cost.

Gamma climbs near expiration

Gamma is how fast delta changes when the underlying moves. For options near the money it rises sharply in the final weeks. For a condor that means the same move in the stock does much more damage in expiration week than it would have a month earlier. A short strike that looked safe can flip to at-the-money in a day or two.

Closing at 50% usually gets you out before that stretch.

Gamma risk near expiration covers the mechanics in more detail.

Buying power comes back

A condor ties up roughly its max loss in buying power until you close it.

Closing at 50% frees that capital for the next trade instead of leaving it parked for the last few dollars of decay.

What you give up

You give up the second half of the credit on every trade that would have expired worthless. Whether that trade-off pays over many condors depends on the underlying, the IV you sell into, your fills and how you handle losers. I don't have condor backtest data to put a number on it, so I won't pretend to. The mechanics above are why the rule is popular. They don't prove it wins.

How entry DTE changes how fast you reach 50%

An option's time value doesn't decay in a straight line. For an at-the-money option it scales roughly with the square root of the time left:

ATM time value ∝ √(days left)
Half the value remains when √(days left / days at entry) = 0.5
→ days left = days at entry / 4

So an at-the-money option with nothing else changing still holds half its value when three quarters of its life has gone.

The short strikes of an iron condor are out of the money, and out-of-the-money options lose value faster in percentage terms. That means a condor gets to 50% earlier than the at-the-money rule suggests, if the price stays put.

To see how much earlier, I ran a small Black-Scholes model. The setup is simple on purpose:

• Hypothetical $100 underlying, price held at $100 the whole time
• IV held at 18.2% (IWM's at-the-money IV in our data on 23 September 2026), no skew, zero interest rate
• Short strikes at one expected move, rounded to the nearest dollar (roughly 16-delta)
• Long wings $2 beyond each short strike
• Calendar-day decay (DTE / 365), checked once per day

Modelled, price and IV frozen:

In this model the condor reaches half its credit a bit before the halfway point of its life, whatever the entry DTE. A longer entry doesn't get you there faster. It gets you there later in calendar days, with more DTE left at the exit.

That last column is where DTE choice matters. A 45 DTE entry that hits 50% on schedule exits with about three weeks still to go, before the steep part of the gamma curve. A 21 DTE entry hits 50% with only 11 days left, which is already inside that zone.

What speeds it up and what slows it down

The model freezes the two things that matter most in a real trade.

• Price moving toward a short strike slows the clock or reverses it. The threatened side gains value faster than time takes it away.
• IV falling speeds it up. A condor is short vega, so a drop in IV cuts its price even if the stock doesn't move. IV rising does the opposite.

So the table is a best case for a quiet market with flat IV.

If a 45 DTE condor is still short of 50% as it gets near 21 DTE, the price has probably moved against one side or IV has gone up. A time stop next to the profit target covers that case.

Sizing the wings from the expected move

Where you put the short strikes decides how much the price can move before the condor gets into trouble. The market's own estimate of that move comes from implied volatility:

Expected move ≈ Price × IV × √(DTE / 365)

That's roughly a one-standard-deviation move under the same model the IV comes from. Short strikes at the expected move are around 16-delta. Inside it, you collect more and get less room. Outside it, the reverse.

I store one at-the-money IV reading per ticker per day for our screener. Here's where SPY, QQQ and IWM stood on 23 September 2026, and the expected move each implies as a percentage of the price:

Each move is IV × √(DTE / 365). For SPY at 30 DTE that's 11.9% × √(30/365) = 11.9% × 0.287 ≈ 3.4%.

To turn that into strikes, multiply by the price. Say an ETF trades at $500 with SPY's 11.9% IV and you're looking at 45 DTE: $500 × 0.119 × √(45/365) ≈ $21. Short strikes near $479 and $521 would sit at about one expected move.

A few limits on these numbers:

• The IV is for the nearest standard monthly expiration at least 7 days out, backed out of real option prices. Other expirations can trade at a different IV, so using one IV for every DTE is an approximation. Check the actual chain before you trade.
• Rank and percentile use each ticker's stored readings, up to the latest 252 (SPY 222, QQQ 242, IWM 219). Our history for these tickers starts in July 2025 for SPY and IWM and May 2025 for QQQ, so the window isn't exactly one year. IV rank vs IV percentile explains both metrics.
• These are one day's readings. IV moves, so the ranges move with it.

On that date all three were in the lower part of their own range. SPY's IV percentile was 27, IWM's 24 and QQQ's 39.

Low IV means smaller credits for the same strikes. The 50% target shrinks in dollars with it, while the risk to the wings stays the same size.

Best iron condor stocks goes through which underlyings tend to work and how to screen them by IV.

Wing width

The distance from the short strike to the long strike sets your max loss: width minus credit, times 100. Wider wings bring in a bit more credit and a lot more max loss. Narrower wings cap the loss tightly but leave the credit small relative to the risk.

For the 50% rule, the useful number is the credit as a share of the width.

In the hypothetical above, $1.50 on $5 wide means the 50% exit returns $75 on $350 of max risk.

A 50% plan by entry DTE

Here's the plan I'd start from, with the reasons above behind each step:

1. Enter around 45 DTE. In the model above that reaches 50% with about 24 DTE left, before the last three weeks. A 30 DTE entry reaches 50% around 16 DTE even in the model, so a 21 DTE time stop doesn't fit it: use a later stop or none if you enter at 30.
2. Put the short strikes near or outside the expected move for your DTE, using the formula above and the IV on the actual chain.
3. Place a good-till-cancelled buy order at 50% of the credit as soon as the condor fills.
4. Set a time stop around 21 DTE (for a 45 DTE entry). If the target hasn't filled by then, close the condor or roll it rather than hold into expiration week.
5. Decide your loss exit before you enter. Common choices are a set multiple of the credit or a short strike being touched. Pick one and write it down.

Shorter entries (21 DTE and under) do reach 50% sooner in calendar days. The trade-off is that they spend their whole life in the high-gamma part of the curve, with less room for a move against you. Longer entries (60 DTE) take longer and carry more IV exposure, but they give you more time before expiration week.

The 21 DTE time stop is a convention, not a condor-tested result. Our 21-day rule research runs a simulated backtest of that rule on a 35 DTE wheel strategy, selling puts and calls, not iron condors. A wheel can end up owning shares and a condor can't, so its results don't tell you how the rule works on condors. The 21 DTE rule explained covers the rule itself.

When one side is tested

Usually the price drifts toward one short strike and the 50% target drifts out of reach.

You can close the whole condor and take the smaller profit or loss. You can close only the tested spread and let the other side keep decaying. Or you can roll the tested side further out for a credit.

Each one costs something. Closing four legs means paying four bid-ask spreads, and rolling adds new risk on top of the old. When to roll vs close walks through that decision.

Whichever you pick, decide it before you open the trade.

The bottom line

Closing at 50% trades the second half of the credit for getting out before the high-gamma weeks. Entry DTE sets the pace: with price and IV still, a condor gets there a bit before halfway, so in the model a 45 DTE entry exits with about 24 DTE left and a 30 DTE entry with about 16. That's why around 45 DTE pairs best with a 21 DTE time stop. Size the short strikes from the expected move on today's IV, set the buy-back order when you open, and decide your time stop and loss exit up front.

Related Articles

Iron condors:

• Iron Condor Strategy: The Complete Beginner to Intermediate Guide
• Best Iron Condor Stocks
• Iron Condor vs Iron Butterfly

The two sides:

• Put Credit Spreads
• Call Credit Spreads
• Credit Spread Width Selection by DTE

DTE and Greeks:

• Best DTE for Credit Spreads
• Theta Decay by DTE
• Gamma Risk Near Expiration
• Options Greeks Cheat Sheet
• Multi-Leg Options Tracking