Straddle

A straddle is an options strategy that combines a call option and a put option with the same strike price and the same expiry, usually at the money. You can buy both (a long straddle) or sell both (a short straddle).

• Long straddle: you buy the call and the put. You profit if the price moves a lot in either direction.
• Short straddle: you sell the call and the put. You profit if the price stays close to the strike.

A straddle isn’t a bet on direction. It’s a bet on how much the price will move compared with what the market expects.

Straddle cost = call premium + put premium

Breakevens at expiry = strike ± straddle cost

Worked example: a long straddle

Say an index is at 20,000 with seven days to expiry. You buy the 20,000 call at ₹144 and the 20,000 put at ₹144, one lot each with a lot size of 50 (hypothetical numbers).

• Straddle cost: ₹144 + ₹144 = ₹288 per unit, or ₹288 × 50 = ₹14,400 per lot
• Lower breakeven: 20,000 – 288 = 19,712
• Upper breakeven: 20,000 + 288 = 20,288
• Maximum loss: ₹14,400, if the index closes exactly at 20,000

At expiry, the straddle is worth the distance between the index and the strike, in either direction. The long straddle needs the index to move more than 288 points either way before expiry to make money. The short straddle keeps the full ₹14,400 if the index finishes at 20,000, and starts losing beyond the breakevens.

Long vs short straddle

A long straddle starts close to delta-neutral, with positive gamma: it benefits from big moves and from rising implied volatility, and pays time decay every day. A short straddle has the opposite profile. See net Greeks for how the legs combine.

The straddle price is the market’s expected move

The cost of an at-the-money straddle is roughly the move the market is pricing in by expiry. In the example, a ₹288 straddle means the market expects the index to move about 288 points either way over the next seven days.

• If you think the actual move will be bigger than that, a long straddle fits your view.
• If you think it will be smaller, a short straddle fits.

This is why traders look at the straddle price on the option chain before results, policy announcements and other events: it shows how big a move is already priced in.

Example: a long straddle around an event

Buying a straddle before a big event seems like an obvious way to profit from the move, whichever way it goes. The catch is that implied volatility rises before events and collapses after them. Here’s how that plays out (hypothetical numbers from a pricing model):

• Before results, with IV at 20%, the at-the-money straddle costs ₹442.
• After results, the index moves 200 points and IV falls to 12%. The straddle is now worth ₹297.
• Result: a loss of ₹145 per unit, or ₹7,250 per lot, even though the index moved.

The move happened, but it was smaller than the ₹442 straddle had priced in, and the drop in IV, known as volatility crush, took value out of both legs. In the same model, the index would have needed to move more than about 415 points just for the straddle to break even.

Managing a short straddle

A short straddle wins often, because the index frequently stays inside the breakevens, but its losses can be large and fast. Common ways to manage it:

• A stop-loss on the combined premium. Many traders exit if the straddle’s total value rises by a set amount above what they collected, rather than setting stop-losses on each leg separately.
• Adjusting the strike. If the index moves away, traders roll the straddle to the new at-the-money strike, or close the losing leg.
• Delta hedging. Using futures to keep the position close to delta-neutral as the index moves.
• Adding protection. Buying a further out-of-the-money call and put caps the maximum loss and usually reduces margin. The result is called an iron butterfly, a close relative of the iron condor.
• Watching expiry day. Close to expiry, gamma risk is highest, so a short straddle can swing from profit to loss on a small move.

Selling a straddle without any protection is a naked option position on both sides.

Straddle vs strangle

A strangle is a cheaper, wider version of a straddle. A long strangle costs less but needs a bigger move. A short strangle collects less premium but gives the price more room before it starts losing.

Costs to keep in mind

A straddle has two legs, so opening and closing it means four orders, each paying brokerage, STT and exchange charges. With two legs to fill, leg risk also matters: if one leg fills and the other doesn’t, you’re briefly holding a one-sided position. Placing both legs together as a basket order helps.

To build a straddle, see its payoff and breakevens, and check its net Greeks before you trade, use Stolo’s Option Strategy Builder. To see live straddle prices across strikes, open Stolo’s Nifty option chain.