Long Strangle Strategy: Betting on a Big Move Without Picking a Direction

Some weeks you just know the market is going to move hard. An RBI policy is due, a big company is about to report, or a Budget speech is a few days away. What you don’t know is which way it will break. The long strangle strategy is built for exactly that situation: you buy an out-of-the-money call and an out-of-the-money put, and you make money if the price travels far enough in either direction before expiry.

It sounds like a free lunch. It isn’t. A strangle is cheap to set up precisely because it needs a big move to pay. Below we walk through how it works, a full worked example on Nifty-style numbers, the risks people underestimate, and how it compares with its pricier cousin, the straddle.

What is the long strangle strategy?

A long strangle has two legs, bought together:

• One out-of-the-money (OTM) call option, with a strike above the current price.
• One out-of-the-money put option, with a strike below the current price.

Both options must be on the same underlying and the same expiry. Zerodha Varsity’s chapter on the strangle adds one more condition that beginners often skip: buy them in the same ratio. One lot of call with one lot of put is a strangle. Five and five is a strangle. Two lots of calls against three lots of puts is not, because you have quietly tilted the trade in one direction.

Varsity describes the strangle as an improvement on the straddle, mainly to cut the cost of putting the trade on. In a straddle you buy the at-the-money call and put. In a strangle you move both strikes away from the money, and because OTM options always trade cheaper than ATM options, the total premium falls. The trade-off is that the market now has to travel further before you break even.

Investopedia’s explainer sums up the risk profile the same way: the maximum loss is limited to the total premium paid, while the profit potential is unlimited if the asset makes a large move.

The payoff in plain terms

At expiry there are only three zones to think about.

Between the two strikes. Both options expire worthless. You lose the full premium you paid. This is your worst case, and it is also the most common outcome when nothing dramatic happens.

Above the call strike. The call starts to carry intrinsic value. Once that value covers the combined premium of both legs, you are in profit, and every point higher adds to it.

Below the put strike. Same story in reverse. The put gains value as the price falls, and past the lower breakeven every extra point down is profit.

The formulas, as laid out in Varsity, are simple enough to do in your head:

• Maximum loss = net premium paid (call premium + put premium).
• Upper breakeven = call strike + net premium paid.
• Lower breakeven = put strike − net premium paid.
• Maximum profit = unlimited on the upside, and large on the downside (the underlying can only fall to zero).

A strangle doesn’t care which way the market goes. It only cares whether the move is big enough, and quick enough, to beat the premium you paid.

A worked long strangle example

Let’s build one. The prices below are illustrative numbers we have chosen to make the arithmetic clear; they are not live quotes. Before you trade, pull real premiums from the option chain and the current lot size from NSE’s contract specifications.

Say the index is at 24,000 and a major event is due before the weekly expiry. You pick strikes 400 points away on each side:

• Buy the 24,400 call at a premium of 80.
• Buy the 23,600 put at a premium of 70.

Net premium paid = 80 + 70 = 150 points per unit. That 150 is the most you can lose. Multiply it by the lot size to get the rupee figure for one lot of each.

Breakevens:

• Upper breakeven = 24,400 + 150 = 24,550.
• Lower breakeven = 23,600 − 150 = 23,450.

So the index has to move 550 points either way from 24,000, roughly 2.29%, just for you to get your money back by expiry. Now the scenarios.

Look at the symmetry. A 1,000-point fall and a 1,000-point rise produce the same result, because we picked strikes the same distance from the starting price. Look also at the flat floor of −150 anywhere between 23,600 and 24,400. That stretch is 800 points wide, and the index has to escape it, and then some, for the trade to work.

Notice the 24,500 row too. The index went up 500 points, a decent move by most standards, and you still lost money. That is the strangle’s personality in one line.

Strangle vs straddle: what the cheaper price really costs you

Now compare with a long straddle on the same illustrative setup. Suppose the at-the-money 24,000 call trades at 210 and the 24,000 put at 200 (again, our numbers for illustration). Net premium = 410.

• Straddle breakevens: 24,000 + 410 = 24,410, and 24,000 − 410 = 23,590.
• Required move to break even: 410 points, roughly 1.71%.

Side by side:

• The straddle costs 410 per unit and needs about a 1.71% move.
• The strangle costs 150 per unit and needs about a 2.29% move.

So the strangle risks far less money but asks for a bigger swing. Which one is “better” depends on how big a move you genuinely expect. If you think the event could shake the index 3% or more, the strangle’s lower cost makes its returns on capital look attractive. If you expect something closer to 2%, the straddle may actually be the one that pays. We cover the selling side of this trade in our post on the short straddle strategy, which is worth reading just to see who sits on the other side of your strangle.

The Greeks behind a long strangle

You don’t need a maths degree here, but three Greeks decide whether the trade survives.

Delta. Since both options are OTM and roughly the same distance from the price, the call’s positive delta and the put’s negative delta largely cancel out. Varsity’s example assumes about 0.3 on each side, giving a combined delta near zero. In practice the two won’t match perfectly, but the position starts out close to direction-neutral.

Vega. You own two options, so you are long volatility. If implied volatility rises while you hold the trade, both legs gain value even if the price hasn’t moved much. If it falls, both lose. Varsity’s checklist is blunt: volatility should be relatively low when you set up the trade and should rise during the holding period.

Theta. Time is against you every single day. Two long options means double the decay. OTM options are mostly time value, so a quiet couple of sessions can shave a painful chunk off the premium.

The cruellest outcome for a strangle buyer is not a move in the wrong direction. It is no move at all, followed by a collapse in volatility.

When a long strangle makes sense

Both Varsity and Investopedia point to the same use case: set it up around events whose outcome could be very different from what the market expects. In an Indian context, the usual candidates are:

• RBI monetary policy announcements, especially when the street is split on the decision.
• Quarterly results of heavyweight stocks, where a surprise in either direction can move the share sharply.
• The Union Budget.
• Election results.
• Regulatory rulings or major court verdicts affecting a single company.

Here’s the catch, and it’s a big one. Everyone else knows about these events too. Option sellers price the expected move into premiums well before the day. That’s why implied volatility tends to climb into an event and drop sharply once the news is out. If the actual move is only as big as the market expected, you can be right about “a big move” and still lose. Our explainer on IV crush in options shows how fast premiums deflate the morning after results.

Varsity also stresses timing: the move has to happen quickly, well within the expiry. A strangle bought with a month to go and an event on day two gives theta a long runway to eat into your position if the reaction is muted.

Choosing strikes and expiry

There is no magic distance. Varsity’s own example picks strikes 200 points either side of the index and says plainly that there’s no particular reason for that choice. A few practical thoughts from us:

• Further OTM means cheaper premium and a lower maximum loss, but a wider dead zone and a smaller chance of ever breaking even.
• Closer to the money means a costlier trade that behaves more like a straddle.
• Check liquidity. Far OTM strikes on stock options can have wide bid-ask spreads. Paying a few points too much on each leg, both when entering and exiting, can wipe out the edge on a trade that needs every point.
• Match expiry to the event. Choose an expiry just after the event, not one that gives months of decay for a one-day catalyst.

One more check before you click buy: compare current implied volatility with recent realised volatility. If options are already expensive relative to how much the stock usually moves, the strangle is starting at a disadvantage. Our guide to implied vs historical volatility walks through that comparison.

Managing the trade after you enter

A strangle doesn’t have to be held to expiry, and often shouldn’t be.

• Take profits on the winning leg. If the event triggers a sharp move, one leg will balloon. Many traders book the gain rather than waiting for expiry and risking a reversal.
• Don’t forget the losing leg. After a big move, the other option is usually nearly worthless. Selling it recovers a little; holding it is a free lottery ticket only if you are comfortable with that.
• Set a time stop. If the event passes and the move hasn’t come, decide in advance how much decay you’ll accept before exiting what’s left.
• Size it small. Because the maximum loss is the full premium, and that loss is a common outcome, treat the premium as money you may well lose entirely. Our risk management in trading guide covers position sizing in detail.

The short strangle, briefly

Flip every leg and you get the short strangle: sell the OTM call and the OTM put. Varsity describes it as profitable as long as the price stays between the two breakevens, with the maximum profit capped at the premium received. The risk, though, is open-ended if the market breaks out sharply. That’s a very different trade with a very different risk profile, and it needs margin and close monitoring. Don’t confuse the two.

Long strangle strategy: the quick checklist

• You expect a large move but genuinely don’t know the direction.
• There’s a clear, near-term catalyst, and your expiry sits just after it.
• Implied volatility isn’t already sky-high compared with how much the stock normally moves.
• You’ve worked out both breakevens and the percentage move needed to reach them.
• You’re prepared to lose the full premium, and you’ve sized the trade accordingly.
• You know in advance when you’ll exit if the move doesn’t come.

Used with discipline, the long strangle is a neat way to put a limited, known amount of money behind a “something big is coming” view. Used casually before every event, it tends to become a steady donation to the people selling those options.

Disclaimer: This article is for information and education only and is not investment advice. Options trading carries a high level of risk. Please consult a SEBI-registered adviser before making investment decisions.