Long Straddle Explained
A long straddle buys an at-the-money call and put together: a pure bet that the underlying makes a large move, in either direction, before expiration.
What it is
A long straddle buys an at-the-money call and an at-the-money put at the same strike and expiration. You pay both premiums and profit if the underlying moves far enough in either direction to cover the combined cost. It is a pure long-volatility trade: it does not care which way the underlying goes, only that it moves more than the market has priced in. It starts delta-neutral and is long gamma and long vega, so it gains from a big realised move and from a rise in implied volatility, while it bleeds from time decay every day the underlying sits still.
Payoff at expiration
When to use it
Buy a straddle when you expect a large move but are unsure of the direction, and when implied volatility is low relative to the move you anticipate, so you are not overpaying for the options. It suits setups like a binary catalyst whose outcome is unknown, a coiled range you expect to break, or a market you think is underpricing risk. The enemy is the IV crush: buying a straddle into a known event like earnings often loses even on a correct move, because implied volatility collapses afterward. Prefer situations where the move can come as a surprise rather than one the whole market is already pricing.
Greeks profile
| Delta | Near zero at entry, the trade is direction-neutral and profits from the size of the move, not its sign. |
| Gamma | Long gamma. Your delta grows in the direction of any move, which is what lets a large swing pay off. |
| Theta | Negative. Time decay works against you every day the underlying fails to move, and it accelerates into expiry. |
| Vega | Long vega. A rise in implied volatility helps even before the underlying moves; a drop hurts. |
Max profit, max loss & break-evens
Unlimited on the upside and large on the downside, growing as the underlying moves far from the strike. Max loss = total premium paid, realised if the underlying finishes exactly at the strike. Lower BE = strike − total premium · Upper BE = strike + total premium
Concrete example
A stock trades at 100. You buy the one-month 100 call for 3 and the 100 put for 3, a total cost of 6. You profit only if the stock finishes below 94 or above 106, the break-evens. If it swings to 115 the call is worth 15 against your 6 cost, a 9-point gain; if it sits at 100 you lose the full 6. The trade needs a move larger than the 6 percent the options priced in.
Risks & management
The two enemies are time and volatility. Every calm day bleeds theta, and a fall in implied volatility, especially the IV crush after an event, can sink the position even when the underlying moves your way. The maximum loss is capped at the premium, but that premium can be a large percentage of the stock to risk, so sizing matters. Manage by taking profit when a move happens rather than waiting for more, cutting the position before an expected event if the volatility is already priced in, and avoiding buying straddles when implied volatility is already elevated.
You are reading the free part.
The full breakdown — how it is calculated, why it matters, and a worked example — is just below. Tell us where to send it and keep reading. It is free.
No spam. Your access to the full CrossVol glossary, and the Terminal that powers it.
Key terms
Trade this structure with the CrossVol Terminal
Screen the setup, read dealer positioning and live Greeks, and size it against real IV rank — all in one workspace.
Launch the CrossVol Terminal — $99/mo