Straddles and Strangles - Trading Volatility, Not Direction

By EC Assets Research Team, Derivatives Research · Published 20 May 2026 · Updated 14 October 2026

Straddles and Strangles: A straddle buys a call and a put at the same strike; a strangle buys them at different out-of-the-money strikes. Both are long-volatility positions that profit from a large move in either direction and lose to time decay if the underlying stays still.

What Straddles and Strangles Are

Straddles and strangles are the classic ways to trade the size of a move rather than its direction. Both buy a call and a put on the same underlying and expiry. They gain if the price moves far enough in either direction and lose if it stays still. They are the most direct expression of a long-volatility view.

A long straddle buys the call and the put at the same strike, usually at the money. A long strangle buys an out-of-the-money call and an out-of-the-money put at different strikes. The strangle is cheaper because both legs start out of the money, and it needs a larger move to pay off.

How It Works

The maximum loss on either is the premium paid; both legs are long options, so there are no margin calls. The gain grows with the size of the move: without limit on the upside, and down to a price of zero on the downside.

The underlying must move further than the premium paid, and that premium already contains the market's estimate of the move.

That last point is the whole trade. The price of an at-the-money straddle is the market's expected move to expiry, approximately

$$\text{Straddle} \approx 0.8 \times \sigma \times S \times \sqrt{T}$$

where σ is the implied volatility. Buying a straddle is not a bet that the market will move; it is a bet that it will move more than this. The position is long gamma and long vega, and pays for both through theta every quiet day.

Worked Example

A stock trades at 100 and reports earnings tonight. Options expiring in seven days trade at 60 percent implied volatility. The 100 straddle costs 6.63, close to the rule-of-thumb 0.8 × 0.60 × 100 × √(7/365) = 6.65: the market is pricing a move of about 6.6 percent. The 95/105 strangle costs 2.79. After the announcement, implied volatility falls to 25 percent, its normal level, with six days left.

A 5 percent move feels large and still loses money, because it falls short of the 6.6 percent move priced in; the collapse in implied volatility does the rest.

The pattern is the vol crush. Implied volatility for the expiry that contains the event is bid up beforehand and falls back as soon as the uncertainty is resolved. Buying the event without a view that the move will exceed the priced one is paying for volatility that disappears overnight. The payoff builder shows the expiry profile of a straddle; the table shows why the path to expiry matters as much.

When It Applies (and Limitations)

Long positions need a view on size, not just on events. A known catalyst is already in the price. The trade makes sense when there is reason to believe the market is underestimating the move, or when implied volatility is low relative to its history and likely to rise.

Time decay is relentless. A long straddle loses value every day the market is quiet, and the decay accelerates near expiry. Choosing a later expiry reduces the daily cost but dilutes the exposure to a specific event.

Short positions carry the tail. Short straddles and strangles collect premium and profit from calm markets, harvesting the volatility risk premium. Their losses on a large move are large for straddles and unlimited for strangles, which is why many programmes add protective wings and turn them into iron butterflies or condors.

Skew changes the arithmetic. In equity markets out-of-the-money puts usually carry higher implied volatility than calls, so a strangle's put leg is relatively expensive. The breakevens are rarely symmetric in probability even when they are symmetric in price.

Why It Matters for Institutional Investors

They express views on magnitude. Volatility and macro desks use straddles and strangles to trade the size of moves around central bank decisions, elections and earnings, and to trade implied against realised volatility.

They are the building block of volatility strategies. A delta-hedged straddle isolates volatility exposure, the basis of gamma scalping, dispersion and relative-value volatility trades.

They reveal what the market expects. The at-the-money straddle price is the quickest read of the move priced into an event. Comparing it with the moves that followed past events shows whether options on a name are systematically rich or cheap around announcements.

They test a manager's claims. A volatility manager who buys event straddles should be able to show that realised moves have exceeded implied ones; one who sells them should show how the book survives the event that moves three times the priced amount.

References

1. Dubinsky, A., Johannes, M., Kaeck, A., & Seeger, N. J. (2019). Option Pricing of Earnings Announcement Risks. Review of Financial Studies, 32(2), 646-687.
2. Natenberg, S. (2015). Option Volatility and Pricing (2nd ed.). McGraw-Hill.
3. Sinclair, E. (2013). Volatility Trading (2nd ed.). Wiley.
4. Hull, J. C. (2022). Options, Futures, and Other Derivatives (11th ed.). Pearson.