What is a strangle?
A long strangle is a call above the current price and a put below it, both in the same expiration. Both start out of the money, so both cost less than the at-the-money options in a straddle.
The saving comes with a wider dead zone. Between the two strikes, both legs expire worthless and you lose the whole debit.
When traders use it
Traders buy strangles when they expect a large move and want to pay less for the exposure.
- A binary event where the outcome could be dramatic.
- The at-the-money straddle looks too expensive.
- You want a long-volatility position with a smaller cash outlay.
The P/L shape
The payoff is a flat-bottomed valley. The floor runs between the strikes, and the sides rise from each breakeven.
Worked example. XYZ trades at $100. You buy the $105 call for $2.00 and the $95 put for $1.90, a debit of $3.90 or $390.
- Max loss
- $390 — the debit, anywhere between $95 and $105
- Breakevens
- $91.10 and $108.90 — each strike, widened by the debit
- Max profit
- Open-ended above $108.90; up to $9,110 below
Compare that with a $100 straddle needing only $92.20 or $107.80. The strangle costs half as much and asks the stock to travel about a dollar further each way.
Greeks and time decay
Delta starts near zero and picks up as the stock approaches either strike. Gamma is lower than a straddle's while price sits in the middle, then rises sharply once a strike comes into play.
Theta is negative on both legs, and out-of-the-money options decay fastest in percentage terms near the end. Vega is positive, so this position is long implied volatility as much as it is long movement.
Build it in DeltaForm
- Open the builder and choose the symbol and expiration.
- Add a long call above the current price.
- Add a long put below it, same expiration.
- Read both breakevens and the width of the flat zone off the curve.
- Cut implied volatility in the scenario controls to test the downside case.
Frequently asked questions
How far out of the money should the strikes be?
Wider strikes cost less and demand a bigger move. A useful check is to compare each breakeven against the move the option chain is already pricing for that expiration.
Does a strangle beat a straddle?
Only on a large move. On a moderate one the straddle usually wins, because its breakevens sit closer in. Model both on the same expiration before deciding.
What if the stock does nothing?
You lose the full debit. That is the most likely single outcome for a long strangle, which is why position size matters more here than in a defined-target trade.