Call Ratio
Spread

What is a call ratio spread?

A call ratio spread is a multi-leg options trade that buys one lower-strike call and sells two higher-strike calls of the same expiry — a 1×2 structure. Because you sell more options than you buy, the premium collected usually exceeds the premium paid, so the trade is frequently opened for a net credit.

The payoff is best described as neutral-to-mildly-bullish: you profit most if the underlying grinds up to the short strike by expiry, where the long call is fully in the money and both short calls expire worthless. The catch is the extra short call — above the short strike, that uncovered leg creates open-ended upside risk, the defining hazard of this strategy.

Key takeaways

• Structure: buy 1 lower-strike call, sell 2 higher-strike calls, same expiry.
• It is neutral-to-mildly-bullish — you want a gentle drift up, not an explosion.
• Often opened for a net credit, since two short calls bring in more than one long call costs.
• Maximum profit lands if the underlying expires right at the short strike.
• The extra short call leaves open-ended risk above the short strike — the trade must be managed.

How a call ratio spread works

Think of it as a bull call spread (long lower call, short higher call) plus one extra naked short call at the upper strike. Below the long strike everything expires worthless and you keep any credit. Between the strikes the long call gains value, peaking at the short strike. Above the short strike the two short calls start losing faster than the single long call gains, so profit erodes, hits a second breakeven, and then the loss runs without limit.

Because one short call is effectively uncovered, the exchange blocks SPAN + exposure margin on the net short exposure. Time decay generally helps — if the underlying sits below the short strike, theta erodes the short calls in your favour — and falling implied volatility aids the net-short vega. For index options the legs are cash-settled, so a runaway move is settled in cash, not delivery.

The numbers that matter

Worked NIFTY example

Suppose NIFTY is near 22,500 and you expect a slow grind toward 22,700, not a breakout. You buy one 22,500 call at ₹150 and sell two 22,700 calls at ₹80 each. The net premium is (2 × 80) − 150 = ₹10 credit. With a lot size of 75, you collect ₹10 × 75 = ₹750 up front (illustrative figures):

• Max profit: at 22,700, the long call is worth 200 points; profit = (200 + 10) × 75 = ₹15,750.
• Upper breakeven: 22,700 + 210 = 22,910, beyond which the extra short call dominates.
• Above breakeven: loss grows ₹75 for every additional point — open-ended.

NIFTY at expiry	Outcome	P&L (1 lot)
22,400	All calls worthless	+₹750
22,500	Long call ATM	+₹750
22,700 (short strike)	Peak profit	+₹15,750
22,910 (upper BE)	Profit erased	₹0
23,300	Extra short call hurts	−₹29,250

The sweet spot is a controlled drift to 22,700. A sharp breakout above 22,910 is the real danger — that lone uncovered call has no ceiling on its losses.

When to use a call ratio spread

• You expect a mild, capped move up toward a level you can name — not a breakout.
• Implied volatility is elevated, making the two short calls richly priced.
• You want a trade that profits even if the market stalls, thanks to the credit and theta.
• You have a strict exit plan or a protective long above to cap the open upside risk.

Risks to respect

• Open-ended upside: a gap-up past the upper breakeven can produce large, uncapped losses.
• Margin expansion: as the trade moves against you, blocked margin can rise and force a square-off.
• Assignment on the extra short call: deep-ITM short calls can be assigned, leaving a settlement obligation.
• Wrong-way IV: a volatility spike inflates the net-short position before the move even completes.

Call ratio spread vs bull call spread

A bull call spread buys one call and sells one call — risk is fully defined and capped. The call ratio spread adds a second short call to harvest more premium (often a credit) and a higher peak profit, but that extra leg converts the defined-risk spread into one with open-ended upside risk. Choose the ratio only when you are confident the move will stay contained.

Call ratio spread vs call ratio back spread

The call ratio back spread is the mirror image: it sells one call and buys two higher calls, so it wants a big rally and has open profit, capped risk. The call ratio spread does the opposite — it sells the extra call, profits from a stall or mild rise, and carries the open risk. They suit opposite views on how violent the move will be.

Common adjustments

To cap the open risk, traders buy a further out-of-the-money call, converting the position into a defined-risk broken-wing butterfly. Rolling the short calls up and out as the market rises locks in gains and re-extends the profit zone. If the view turns wrong, closing the extra short call alone leaves a clean bull call spread.

Frequently asked questions

Is a call ratio spread bullish or bearish?

Neutral-to-mildly-bullish. The ideal is a gentle drift up to the short strike by expiry; a sharp rally beyond it turns the trade into a loss.

What is the maximum loss on a call ratio spread?

Open-ended above the short strike, because of the extra short call. A runaway rally can cause large losses, so the position needs management or a protective long.

Why is a call ratio spread often a credit?

Selling two calls usually brings in more than buying one lower-strike call costs, so the trade frequently opens for a net credit that cushions the downside.

Where does a call ratio spread make the most money?

At the short strike on expiry: the long call is fully in the money, both short calls expire worthless, and you keep any opening credit.

The bottom line

The call ratio spread is a precision trade for a mildly bullish-to-neutral view: collect a credit, let theta work, and earn a peak payoff if the market drifts up to the short strike. But the extra short call is a loaded leg — above the upper breakeven the loss has no ceiling. Treat it as an advanced, actively-managed position, ideally with a protective long or a firm stop, and it becomes a clean way to monetise a contained move.

Related strategies & terms

• Bull Call Spread — the defined-risk 1×1 base of this trade.
• Call Ratio Back Spread — the mirror that wants a big rally.
• Put Ratio Spread — the downside equivalent of this structure.
• Undefined Risk · Theta · SPAN Margin