Two very different reasons to buy puts

1. Speculation: You expect the market to fall. Buy a put; profit as it drops.

2. Hedging: You own stocks and don’t want to sell them, but want insurance against a crash. Buy a put on the index or the stock itself.

Both use the same instrument but the psychology is completely different.

Speculation example

Example

Sensex 80,000 weekly put

Sensex at ₹80,000. RBI policy meeting on Friday — you expect a hawkish surprise to hit banks (Sensex is bank-heavy). You buy 1 Sensex 80,000 PUT expiring Thursday for ₹250 premium.

Cost = 250 × 20 = ₹5,000
Break-even at expiry = 80,000 − 250 = 79,750

At Thursday close:

Sensex at 78,800: Put worth 1,200. Payoff = 1,200 × 20 = 24,000. Profit = ₹19,000 (+380%).

Sensex at 79,500: Put worth 500. Profit = 500 × 20 − 5,000 = ₹5,000.

Sensex at 80,200: Put worthless. Loss = ₹5,000 (full premium).

Hedging example — protective put

Example

Protecting a Nifty ETF portfolio

You hold Nifty ETF worth ₹5,00,000 (roughly 200 units at ₹2,500). Nifty spot at 25,000. You’re worried about a 5–10% correction over the next month but don’t want to sell.

You buy 1 Nifty 24,500 monthly PUT (about 2% below spot) for ₹120.

Cost = 120 × 25 = ₹3,000 (0.6% of portfolio — like an insurance premium)
Portfolio worth today: ₹5,00,000

If Nifty drops to 23,000 (−8%):

Portfolio loses ~8% = −₹40,000
Put worth 1,500 × 25 = +₹37,500
Net loss: only ₹5,500 (~1%)

If Nifty stays at 25,000:

Portfolio flat
Put expires worthless → lose ₹3,000

You bought insurance. Small premium, big protection when needed.

The math

Long put formulas

Break-even (at expiry) = Strike − Premium

Maximum loss = Premium paid × Lot size

Maximum profit = (Strike − Premium) × Lot size (if underlying goes to zero)

Profit at expiry = (Strike − Spot − Premium) × Lot size (if ITM)

Choosing the strike

Strike	Premium	Delta	Best for
ITM (above spot)	Highest	~0.7–0.9	Directional short bet, capital-efficient
ATM	Moderate	~0.5	Balanced speculation
OTM (below spot)	Cheapest	~0.1–0.3	Portfolio insurance (bought cheap “just in case”)

For hedging, most retail buy 3–5% OTM puts, monthly cycle — cheap enough to renew every month, still protect against a real correction.

When puts are better than shorting

No short-selling restrictions — India requires margin/borrow for shorting
Capped loss — worst case you lose the premium, unlike shorting where you can lose more than the stock price
No forced buy-in on delivery obligations
Small capital — buy a put with a fraction of what you’d need to short the underlying

When NOT to buy puts

After a huge drop — puts get expensive (high IV) and often lose value even if the market drops more
In slow decline expected — theta decay eats you before the move materializes
As “portfolio insurance” if you can’t handle the cost — puts drag on returns in a bull market, sometimes for years

The “rolling protection” strategy

For long-term hedging, roll puts monthly:

Buy 1 monthly OTM put on Nifty (~2% below spot)
As it approaches expiry, close it (or let it expire worthless)
Buy the next month’s put
Cost: ~1–1.5% of portfolio value per year in flat markets
Payout: enormous if a real crash comes

Think of it as home insurance for your portfolio. Most months you pay premium for nothing. When something happens, you’re glad you had it.

💡 The math of insurance

Long puts systematically underperform the underlying in bull markets — that’s the cost of protection. Judge them by their crash-payoff, not month-to-month returns. If your portfolio lost 5% less in the worst month, the puts paid for themselves for years.

When calls and puts are both worth buying: earnings straddles

Buy a call AND a put at the same strike (long straddle — Chapter 8). Profits if the underlying makes a big move in either direction. Common trade around Nifty results week, budget day, or Fed meetings.

Try it

Payoff calculator → “Long put” preset. Toggle spot from 80,000 down to 78,000 and watch the profit line rise.