Bull Put Spread Strategy in Indian Markets

What a Bull Put Spread Actually Is

A bull put spread, also called a put credit spread, sells a higher-strike put and buys a lower-strike put with the same underlying, expiry and quantity. The net credit is the premium received minus the premium paid. It is the maximum gross expiry profit when both legs, the separate option positions, remain intact.

The lower-strike put limits the combined gross expiry loss, assuming matching intact legs. A naked put can have a large loss as the underlying approaches zero; its downside is not mathematically unlimited. Separate executions or physical delivery can create additional risks and funding needs.

At or above the higher strike at expiry, both puts have zero intrinsic value and the spread keeps its gross credit. Between the strikes, the short put reduces that result. Charges shift the after-cost breakeven.

The Four Numbers You Must Know Before Entry

Key gross expiry quantities are net credit, maximum profit, maximum loss and breakeven. They do not by themselves describe margin, execution or delivery funding.

• Net credit = premium received on the sold put minus premium paid on the bought put. This is your maximum profit per share, before costs.
• Maximum profit = net credit multiplied by the lot size (and number of lots). Achieved if the underlying closes at or above the higher strike.
• Maximum gross expiry loss = (higher strike minus lower strike minus net credit per unit) multiplied by total underlying units on each matching leg. It applies at or below the lower strike.
• Breakeven = higher strike minus net credit. Above this level at expiry you are in profit, below it you are in loss.

Worked Example: A Nifty Bull Put Spread (Illustrative)

Illustrative Nifty spread: assume higher strike 24,800, lower strike 24,600, sold premium ₹120, bought premium ₹70 and total quantity 65 units per leg. The quantity is an assumption, not a live lot-size quotation.

Example net credit is 120 − 70 = ₹50 per unit. Strike width is 24,800 − 24,600 = 200. Both legs have the same expiry and assumed quantity.

• Total credit and maximum gross expiry profit: 50 × 65 = ₹3,250.
• Maximum gross expiry loss: (200 − 50) × 65 = ₹9,750.
• Gross expiry breakeven: 24,800 − 50 = 24,750.
• All figures exclude charges and assume both legs remain intact.

Example loss divided by profit is 3. This ratio does not show how often either outcome occurs. No measured probability or expected return is claimed.

Profit and Loss at Different Expiry Levels

The table uses the same invented spread and assumed 65 units per leg. It shows gross expiry outcomes, not live prices or an after-charge bill.

Below the bought put’s strike, both puts gain intrinsic value at the same rate as the underlying falls, so their difference remains the strike width. This bounds the combined gross expiry payoff. It does not remove delivery funding or the risk of executing the positions separately.

Bull Put Spread Versus Other Bullish Plays

A bull put spread receives a net credit at entry. A bull call spread pays a net debit, meaning an opening payment. Matching-strike spreads can have related expiry payoff shapes; receiving money rather than paying it does not by itself establish a better outcome.

Compare actual executable premiums, charges, funding and settlement. Credit versus debit alone does not establish a difference in expected return.

Choosing Strikes, Expiry and Position Size

Delta is sensitivity to the underlying, not a verified probability of expiry success. No fixed delta range or win rate is recommended here.

Read the actual expiry date and time remaining. Current NSE Nifty specifications use Tuesday weekly and last-Tuesday monthly expiry, shifted to the preceding trading day for a holiday. Bank Nifty has monthly and quarterly options, without a weekly series.

• Check executable prices and available quantity on both legs.
• Compare strike width and credit together.
• Check the broker’s current margin for the complete position.
• Review what happens if only one leg fills or expires in the money.

Managing the Trade and Adjusting

Closing early changes the realised payoff and incurs execution costs. No universal percentage-profit exit is established here. Confirm both closing trades complete before treating the position as closed.

Rolling closes an old trade and opens a new one. It can realise a loss, require additional funds and create different risk; extra credit does not undo the prior loss.

Implied Volatility and Time Decay

Both option prices respond to implied volatility, the expected price swings reflected in option prices. The net effect depends on both positions, their strikes and current market conditions. An opening credit does not guarantee a favourable result from a volatility increase.

The net time-decay effect can change as the underlying moves relative to the strikes. It is not a daily payment or assured progress toward maximum profit.

Charges and Tax Records

The strategy name does not determine income-tax treatment. Retain each leg’s transactions, settlement and charges for a qualified tax adviser.

STT is a transaction tax separate from income tax. For spread legs sold on or after 1 April 2026, STT is 0.15% of sale premium. A bought leg exercised in the money uses 0.15% of intrinsic value instead. Exercise does not automatically mean a higher rate or larger bill.

Costs can reduce a small credit significantly. Do not treat gross maximum profit as the amount kept after brokerage, statutory charges or income tax.

Liquidity, Slippage and Execution

Check both strikes’ spread and depth. A liquid index does not guarantee an executable quote at every strike or quantity. Open interest alone cannot guarantee an exit.

• A limit order controls its permitted price but can remain unfilled.
• Separate leg execution can temporarily leave a naked position.
• Check that both entry and closing quantities match.
• Review expiry delivery even when the combined payoff is bounded.

Common Mistakes to Avoid

Do not treat a credit spread as a sure or inherently high-probability trade. Its gross loss can exceed its credit by several multiples, and a stop may execute worse than planned.

A stock spread can require physical settlement when only one leg finishes in the money. Even offsetting delivery obligations can have margin requirements. Review each leg rather than assuming the long put removes every obligation.

Related reading: option premiums, assignment and delivery and expiry availability.

Sources

• OIC: Bull put spread payoff (checked 16 Oct 2026)
• Zerodha: Delivery and netted-position margins (checked 16 Oct 2026)
• NSE: Nifty expiry (checked 16 Oct 2026)
• NSE: Bank Nifty cycles (checked 16 Oct 2026)
• NSE: Current option STT (checked 16 Oct 2026)
• Zerodha: option sale and exercise bases (checked 16 Oct 2026)