Long Straddle Calculator
A long straddle involves buying both a call and a put at the same strike and expiration. You profit from a big move in either direction — you just need the stock to move far enough to cover the cost of both premiums.
Price it
Practical example
When to use it
- You think realized volatility will exceed implied volatility (RV > IV) — the market is underpricing the expected move
- You expect a large, possibly violent move but have no directional conviction
- You want long gamma and long vega exposure — profit from either a price move OR an IV expansion
- Ahead of a catalyst where the straddle's implied move seems too cheap relative to historical outcomes
Risks
- You pay two premiums — break-evens are wide, the stock must move more than the total debit by expiration
- Theta is heavily negative — two long options decay together, and decay accelerates near expiration
- IV crush is the primary killer, especially post-earnings: the move happens but vol collapses and the straddle loses money anyway
- Being right on 'there will be a big move' is not enough — the move must exceed the straddle's implied move
The deeper breakdown
How a Long Straddle Works
Buy a call and a put at the same strike and expiration. The payoff is V-shaped: max loss is at the strike (total debit), and profit grows linearly with distance from the strike in either direction. The position is delta-neutral at inception but becomes long-delta if the stock rallies and short-delta if it falls (positive gamma).
Example
AAPL at $195. Buy the $195 call for $3.80 and the $195 put for $3.40. Total cost: $7.20 ($720).
The Real Bet: RV > IV
The market already prices an expected move into the straddle's premium — this is (roughly) the "straddle-implied move". Buying a straddle is not a bet on "there will be a big move." It's a bet that the actual realized move will be larger than what's already priced in.
If the pre-earnings straddle is priced at $7.20 and the stock moves exactly $7, you lose money despite being directionally correct about a big move. The edge only exists when your expected realized move exceeds the implied move.
IV Crush
Before a known event (earnings, FDA decision, macro print), IV inflates to price expected gap risk. After the event, IV collapses. If you bought the straddle expensive and the move is merely "normal", both IV contraction AND time decay work against you simultaneously — a painful combination.
Greek Profile
Key Takeaway
Straddles are pure vol bets. You win when realized exceeds implied AND the vol move happens before decay destroys extrinsic value. Best when IV is underpricing a specific catalyst; worst when buying into elevated IV ahead of an event where the move is already fully priced.
Calculations are theoretical projections from standard pricing models (Black-Scholes), not predictions. Real fills, slippage, dividends, and volatility shifts will cause outcomes to differ. Not investment advice. Full disclaimer.