Put Ratio Backspread Strategy in Indian Markets

What A Put Ratio Backspread Actually Is

A put ratio backspread is an options structure where you sell a smaller number of higher strike puts and buy a larger number of lower strike puts, on the same underlying and the same expiry. The most common version is 1:2, meaning you sell one put at a higher strike and buy two puts at a lower strike. Because you own more options than you have sold, the position is net long volatility and net long puts. It makes serious money only when the underlying falls hard and fast below the lower strike before expiry.

The word backspread tells you the ratio is the reverse of a normal ratio spread. In a plain put ratio spread you sell more than you buy and you are short volatility. In a backspread you buy more than you sell, so a volatility spike and a big directional move both work in your favour. Traders reach for this structure when they expect a possible crash or a sharp gap down, for example into a budget, an RBI policy, a Fed decision, or a major earnings event, but they do not want to pay a big debit for naked long puts.

The clever part is the financing. The single short put you sell is closer to the money, so it carries a fat premium. That premium pays for most or all of the two cheaper, further out of the money puts you buy. If you can build the whole thing for a net credit, then even if the underlying never falls, you keep that credit and the trade was free to put on. The structure only turns ugly in the middle, which we cover in detail below.

The Three Legs And How The Net Cost Is Built

Think of a 1:2 put ratio backspread as three option legs. Leg one is a short put at the higher strike, often at the money or slightly in the money. Legs two and three are two long puts at a lower strike. You collect premium on leg one and you pay premium on legs two and three. The difference is your net cost, which can be a debit you pay or a credit you receive.

• Sell 1 put at the higher strike (collect a large premium).
• Buy 2 puts at the lower strike (pay two smaller premiums).
• Net cost = (2 times lower strike premium) minus (1 times higher strike premium).
• If that number is negative you have a net credit, which is the ideal entry.

Always size the trade in lots, not in single shares, because Indian index and stock options trade only in fixed lot sizes. A 1:2 ratio means one short lot against two long lots as the base unit. If you scale to two units you sell two lots and buy four lots. Mismatching the ratio, for example selling one lot and buying three, changes the whole risk profile and is a different strategy, so keep the ratio deliberate.

The Payoff Diagram In Words

A picture helps, so here is the payoff at expiry described from right to left, assuming you entered for a net credit. Above the higher strike, all puts expire worthless and you simply keep the net credit. The line is flat at a small positive value. Between the higher strike and the lower strike, your single short put goes into the money and starts losing money, while your two long puts are still worthless. This is the falling, loss making part of the diagram and it slopes downward.

At the lower strike, the loss reaches its worst point. This is the valley of the payoff, the maximum loss zone. Below the lower strike, your two long puts both come alive. Because you own two of them against one short put, each further rupee of fall now adds twice the gain it costs on the short put, so the line turns and climbs steeply. Past the breakeven on the downside the position is in profit, and because you hold an extra long put, the theoretical downside profit keeps growing as the underlying falls toward zero.

So the shape is: flat and slightly positive on the right, a downward slope into a V shaped valley at the lower strike, then a steep climb to the left. The two pain free outcomes are a strong fall and a flat or rising market. The single painful outcome is a lazy drift down that parks the underlying right at the lower strike on expiry day.

A Fully Worked Nifty Example With Real Lot Maths

All numbers below are illustrative and are used to show the mechanics, not to predict prices or promise returns. Suppose Nifty is trading near 24,000 ahead of a major event and you expect either nothing much or a sharp drop. The Nifty options lot size is 65. You set up a 1:2 put ratio backspread on the weekly expiry:

• Sell 1 lot of the 24,000 put at a premium of 180 points.
• Buy 2 lots of the 23,700 put at a premium of 85 points each.
• Premium collected = 180 points. Premium paid = 2 times 85 = 170 points.
• Net credit = 180 minus 170 = 10 points. In rupees that is 10 times 75 = Rs 750 received per unit.

Now read the outcomes at expiry. If Nifty closes at or above 24,000, every put expires worthless and you keep the full net credit of Rs 750 per unit. If Nifty closes at 23,700, the worst case, your short 24,000 put is 300 points in the money and loses 300 points, while both long puts are exactly at the money and expire worthless. Your loss on the legs is 300 points, softened by the 10 point credit, so the net loss is 290 points. In rupees that is 290 times 75 = Rs 21,750 of maximum loss per unit, before costs.

Now the payoff in a crash. If Nifty closes at 23,000, the short 24,000 put loses 1,000 points. Each long 23,700 put gains 700 points, and you hold two of them, so they gain 1,400 points together. Net intrinsic on the legs is 1,400 minus 1,000 = 400 points of gain, plus the 10 point credit, giving 410 points. In rupees that is 410 times 75 = Rs 30,750 profit per unit, before costs. The further Nifty falls, the more that extra long put pays, because below 23,700 you effectively own one extra put outright.

Costs That Eat Into The Headline Numbers

The point profit above is gross. Real trading on the NSE carries several charges on every leg, and a backspread has three legs in and up to three legs out, so costs add up. The main ones are Securities Transaction Tax (STT), exchange transaction charges, SEBI turnover fees, GST on brokerage plus exchange and SEBI charges, stamp duty on the buy side, and your broker brokerage. Discount brokers typically cap option brokerage at around Rs 20 per order, but the statutory charges scale with turnover and premium.

STT matters most when options are exercised or settled in the money. On options, STT is charged at 0.1 percent on the sell side premium, and crucially, if an option is exercised or expires in the money it is treated like a delivery style settlement where STT is levied on the intrinsic settlement value, which can be a much larger base. This is exactly why many traders square off in the money option legs before expiry rather than letting them go to settlement, to avoid a nasty STT bill on the full intrinsic value. Always factor a realistic round of charges, perhaps a few hundred rupees per unit across all legs, before treating any point profit as final.

How This Is Taxed In India: Setting The Record Straight

This is where the old version of this page was wrong, so read carefully. Profit and loss from trading Nifty, Bank Nifty and stock futures and options on a recognised exchange is treated as non-speculative business income, not as speculative income and not as capital gains. This is because Section 43(5) of the Income Tax Act specifically excludes exchange traded derivatives from the definition of a speculative transaction. So your backspread gains are added to your other income and taxed at your applicable slab rate, whether you also have a salary, a business, or only trading income.

Two practical consequences follow. First, because F&O is business income, you can deduct related expenses, such as brokerage, STT in many cases, internet, advisory fees, and depreciation on equipment used for trading, against that income. Second, F&O losses are non-speculative business losses, which can be set off against most other heads in the same year except salary, and carried forward for up to eight years if you file your return on time. This is a meaningful advantage that the speculative label would have denied you.

• F&O on NSE and BSE = non-speculative business income, taxed at your slab rate.
• It is not speculative income and it is not capital gains. STCG at 20 percent and LTCG at 12.5 percent above Rs 1.25 lakh apply to delivery equity and equity funds, not to F&O.
• Intraday equity (cash) trading, by contrast, is speculative business income, so do not confuse the two.
• Audit may be required depending on turnover and whether you declare profits under presumptive rules, so consult a CA for your numbers.

Choosing Strikes, Expiry And The Right Underlying

Strike selection controls everything. The short strike is usually at the money or slightly out of the money so that it carries enough premium to finance the two long puts. The long strike sits below it, far enough that the two cheaper puts can be bought largely with the credit from the one short put, but not so far that they are almost worthless and unable to pay off in a crash. A gap of one to three percent of spot between the strikes is a common starting range on Nifty and Bank Nifty, then you adjust to hit a net credit or zero cost.

Expiry choice is a balance. Weekly expiries on Nifty and Sensex are cheap and react fast, but theta decay is brutal and the move must come quickly. Monthly expiries give the thesis more time to play out and the valley is less sharp on any single day, but they cost more in premium and tie up margin longer. As a rule, use the nearer weekly when you expect an imminent event driven crack, and the monthly when you want a standing crash hedge that you can carry.

• Pick a liquid underlying: Nifty (lot 65), Bank Nifty (lot 30), FinNifty (lot 60), Sensex (lot 10), or a very liquid stock such as Reliance, HDFC Bank, TCS or Infosys.
• Place the short strike where premium is rich enough to fund the longs.
• Place the long strike where the puts are still meaningfully alive in a sharp fall.
• Aim for a net credit or zero debit; reject the trade if it can only be built for a fat debit.
• Mind liquidity: wide bid ask spreads on far OTM strikes can quietly erase your edge.

Managing The Trade And Avoiding The Valley

The whole risk of a put ratio backspread lives in the valley at the lower strike near expiry. So the core management rule is simple: do not let a slow, shallow drift carry you into expiry sitting on the lower strike. If your crash thesis has not played out and the underlying is hovering between the two strikes as expiry approaches, the safest action is often to close the structure for whatever it is worth, or to roll it out to a later expiry to buy time. Letting it sit through expiry day in that zone is how the maximum loss is realised.

If the move comes your way and the underlying drops sharply below the lower strike, your two long puts are now carrying the position. Many traders book partial profit by selling one of the two long puts, which crystallises gains and leaves a residual short put plus long put, a near costless structure, to ride further downside. If the underlying rallies hard and quickly instead, the long puts lose value but your short put also moves out of the money, so a net credit entry simply expires worthless in your favour and there is little to do beyond letting it lapse or closing early to free up margin.

• Define your exit before you enter: a target fall level, a time stop, and a maximum acceptable loss.
• If the underlying stalls between strikes near expiry, close or roll rather than gambling on expiry day.
• On a sharp fall, consider selling one long put to lock in gains and lower risk.
• Square off any deep in the money leg before expiry to dodge the higher exercise STT base.
• Keep margin headroom: the short put leg attracts margin, and the broker may raise it near events.

Put Ratio Backspread Versus Simpler Bearish Trades

It helps to see where this structure fits against plainer bearish ideas. Buying a single put is the simplest, with a known limited cost and unlimited downside profit, but you pay the full premium and time decay works against you every day. A bear put spread caps both cost and profit and is cheaper, but it will not pay off explosively in a crash. The put ratio backspread sits apart because it can be entered for a credit, profits hugely in a crash, and only hurts in the middle zone.

In short, the backspread is the tool when you genuinely expect either nothing or a violent fall, and you want the nothing outcome to cost you little or even pay a small credit. If you expect a steady, measured decline, a bear put spread is usually the cleaner choice, because the backspread punishes exactly that slow grind into the lower strike.

Common Mistakes That Quietly Wreck The Trade

The first mistake is paying too much to enter. If you build the backspread for a large debit, you have stacked time decay against yourself and you need a big move just to break even. Insist on a net credit or a small cost. The second mistake is ignoring the valley: traders see the lovely crash payoff and forget that a flat to mildly down market parked at the lower strike on expiry is the single worst case, and they hold to expiry hoping, only to take the full loss.

The third mistake is mis-sizing the ratio or the lots, for example selling more than the intended ratio in pursuit of a bigger credit, which reintroduces naked short risk. The fourth is using illiquid far out of the money strikes whose wide spreads silently swallow the edge. And the fifth, very Indian specific, is letting deep in the money legs go to physical or settlement at expiry and getting hit with a far larger STT base than expected. Square those off in advance.

• Entering for a fat debit instead of a credit or near zero cost.
• Holding into expiry while parked at the lower strike, the maximum loss point.
• Breaking the intended ratio and creating hidden naked short exposure.
• Trading illiquid strikes where the bid ask spread erodes the payoff.
• Allowing in the money legs to settle at expiry and triggering higher STT.

Sources And Further Reading

For authoritative data and contract specifications, refer to the NSE Option Chain, NSE Indices (Nifty Indices), the Income Tax Department for the treatment of business income, and Zerodha Varsity for worked option payoffs. You can also study related option strategies and brush up on technical analysis basics for timing entries. Always confirm current rules, tax rates, lot sizes and charges on the official source before you trade. Nothing here is a guarantee of profit.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to NSE Option Chain, NSE Indices (Nifty Indices), Income Tax Department and Zerodha Varsity. Always confirm current rules, rates and contract specifications on the official source before you trade.