Straddles and Strangles: Trading the Size of the Move

Same destination, different ticket price

A long straddle buys a call and put at the same strike and expiration, usually near the current stock price. A long strangle buys an out-of-the-money put and an out-of-the-money call. The strangle usually costs less and requires a larger move to reach either expiration breakeven.

Short straddles and strangles reverse the legs. Premium arrives at entry, along with exposure to large moves. An uncovered short call can have theoretically unlimited loss, and a short put can lose heavily as the stock approaches zero.

The implied move is the opening conversation

A near-the-money straddle price is often used as a practical estimate of the move embedded in option prices through expiration. A $9 straddle on a $100 stock suggests roughly a 9% premium hurdle before fees when held to expiration. Market makers may apply adjustments, and the final distribution can be far from tidy.

Compare that hurdle with the stock’s realized movement, prior event reactions, current IV percentile, and the volatility of close peers. A dramatic chart headline can feel exciting while the option market has already charged admission.

Worked example: the $9 straddle

A stock trades at $100. The 100 call costs $5 and the 100 put costs $4. Buying both costs $9 per share, or $900 per straddle. The expiration breakevens are $91 and $109.

At $116, the call is worth $16 and the put expires without value, creating a $700 profit. At $105, the combined intrinsic value is $5 and the position loses $400. A large move is useful; a large move beyond what the premium already anticipated is better.

The event-volatility wrinkle

Implied volatility commonly rises ahead of a scheduled event and falls after uncertainty clears. A long position can lose vega value after the event even when the stock moves in the expected direction. A short position can benefit from that contraction while still losing heavily if the gap exceeds the priced range.

Earnings timing also matters. A release before the open and one after the close create different trading windows. Confirm the date, session, and expiration coverage before treating an event badge as a complete plan.

Structure and execution checks

• Use the same expiration for both legs of a standard straddle or strangle.
• Compare breakevens with implied and historical moves.
• Inspect skew because the put and call wings may carry very different implied volatilities.
• Include two bid-ask spreads and two commissions in the economics.
• For short positions, stress gaps well beyond recent history and confirm margin capacity.