Ratio Spread Options Strategy

What is it?

A ratio spread means buying a certain number of options and selling a larger number of options of the same type i.e. calls or puts on the same underlying and expiry. The most common setup is a 1:2 ratio: buy 1 option and sell 2 options at a different strike price.

Traders in India use ratio spread options mostly on Nifty and Bank Nifty. This is because these contracts are liquid and expire weekly or monthly.

Types of Ratio Spreads

How a Call Ratio Spread Works

Let’s go through a quick example. Here Nifty is at 25,000 and the lot size is 100. We have chosen these numbers to make calculation easy.

• Buy 1 lot of 25,000 Call at ₹200
• Sell 2 lots of 25,200 Call at ₹100 each
• Net premium: ₹200 paid – ₹200 received = ₹0 (zero-cost trade)

Payoff at Expiry

Key Numbers

• Maximum profit: Gap between strikes (200 points) × lot size, plus any net credit, minus any net debit
• Upper breakeven: Higher strike + maximum profit points (25,200 + 200 = 25,400)
• Maximum loss: Unlimited on the upside, because you have one extra short call

When to Use it

• You expect the market to rise slowly and modestly
• You expect the index to stay near your sold strike by expiry
• Implied volatility (India VIX) is high, so option premiums are rich
• You want to reduce or eliminate the upfront cost

Advantages

• Can be entered at zero cost or even a small credit
• No loss if the market falls (in a call ratio spread with no net debit)
• Good profit if the market ends near the sold strike
• Benefits from time decay (theta) on the sold options

Risks

• Unlimited loss if the market rallies sharply
• Requires high margin, since you sell naked options
• A sudden jump in volatility hurts the position
• Needs active monitoring, especially on expiry day

Practical Tips for Indian Traders

• Margin: Brokers block SPAN plus exposure margin for the extra short leg. Check the margin calculator before trading.
• Costs: Factor in brokerage, STT, exchange charges, GST and stamp duty, as four legs’ worth of orders add up.
• Risk control: Set a stop-loss or exit if Nifty moves close to the upper breakeven.
• Hedging: Buy a far out-of-the-money call to cap the unlimited risk. This converts it into a more defined-risk structure.
• Expiry choice: Weekly expiries offer faster time decay but need closer tracking.

Quick Comparison

Summary

• Buy fewer options, sell more options at a different strike
• Best for a moderate, controlled price move toward your sold strike
• Low or zero cost, however carries with unlimited risk on one side
• Never miss to check margin requirements, costs and volatility before entering