Protect Your Equity Holdings from Market Falls:
Hedging a Portfolio with Options

Why hedge with options?

Equity portfolios are permanently exposed to market downturns — crashes, policy shocks, global risk-off events, or sector-specific collapses. Selling holdings to avoid a potential fall generates capital gains tax, resets your cost basis, and may cause you to miss the recovery. Options offer a middle path: buy the right to sell at a specified price (a put option) so that if the market falls, your option gains offset portfolio losses, while you remain fully invested for any upside.

The trade-off is cost. Buying puts requires paying premium, which is a recurring expense if you hedge continuously. The craft of portfolio hedging lies in choosing the right instrument, strike, expiry, and structure to balance protection against cost.

The foundational tool: buying NIFTY puts

The simplest hedge for a diversified Indian equity portfolio is buying NIFTY put options. NIFTY puts gain value as the index falls — offsetting losses in a market-tracking portfolio. They are highly liquid, have tight bid-ask spreads, and are available across weekly and monthly expiries on NSE.

NIFTY put hedges work best for portfolios that broadly track the index. For concentrated or high-beta portfolios, the hedge will be imprecise — discussed further below.

How many lots do you need? The beta-adjusted calculation

The number of NIFTY lots required to hedge your portfolio is not simply portfolio value divided by lot value. It must be adjusted for your portfolio's beta — how much your portfolio moves relative to NIFTY.

Formula: Number of lots = (Portfolio Value × Portfolio Beta) ÷ (NIFTY Spot × Lot Size)

Worked example (hypothetical, illustrative): Portfolio value ₹15 lakh, portfolio beta 1.1, NIFTY spot 23,000, lot size 75.
Lots = (15,00,000 × 1.1) ÷ (23,000 × 75) = 16,50,000 ÷ 17,25,000 = 0.96 lots → round to 1 lot.

One NIFTY monthly put lot covering 75 units at 23,000 = ₹17.25 lakh of notional protection. The slight over-hedge (₹17.25 lakh covering a ₹15 lakh portfolio) is acceptable. For a beta-1.5 aggressive portfolio of the same ₹15 lakh value, you would need 1.5 × 0.96 ≈ 1.44 lots — practically 2 lots for full protection, or 1 lot for partial hedge.

Choosing the right strike and expiry

Strike choice. An at-the-money (ATM) put provides immediate dollar-for-dollar protection but is the most expensive. A 3–5% out-of-the-money put costs significantly less but only provides protection once NIFTY falls that percentage — it acts as a deductible. Most portfolio hedgers use a 3–8% OTM put to cover tail risk rather than small day-to-day fluctuations.

For example: NIFTY at 23,000, buying the 22,000 put (4.3% OTM) at ₹50 per unit costs 75 × ₹50 = ₹3,750 per lot. This put provides full protection against every point NIFTY falls below 22,000, but you absorb the first 1,000-point decline unprotected.

Expiry choice. Weekly puts are cheapest per-rupee but require frequent renewal (rolling), which means transaction costs and the risk of brief hedging gaps. Monthly puts offer a better balance for most portfolio managers. For event-specific hedges (budget week, RBI day), choose the expiry that covers the specific date.

Cost reduction: the bear put spread and collar

Buying puts continuously can cost 4–8% of portfolio value per year at normal volatility levels. Two structures help reduce this cost:

Bear put spread. Buy the OTM put you want for protection, and sell a farther OTM put to offset some of the cost. For example, buy the 22,000 put at ₹50 and sell the 21,000 put at ₹20 — net cost drops to ₹30 per unit, saving ₹1,500 per lot. You give up protection below 21,000, but for most correction scenarios (not crashes), protection between 21,000 and 22,000 is the relevant zone.

Collar. A collar funds the put purchase by selling an OTM call against your existing long portfolio. The call premium offsets the put cost — sometimes entirely, creating a "zero-cost collar." The downside: if NIFTY rallies strongly, your portfolio gains are capped at the call strike. Collars are most appropriate when you want protection but are willing to sacrifice some upside.

Worked example: collar on a ₹15 lakh portfolio

Using the same hypothetical scenario: NIFTY at 23,000, portfolio value ₹15 lakh, beta ~1, 1 lot needed. Monthly expiry in 30 days.

• Buy 22,000 put (4.3% OTM) at ₹50 → cost ₹3,750
• Sell 23,800 call (3.5% OTM) at ₹48 → receive ₹3,600
• Net cost = ₹3,750 − ₹3,600 = ₹150 per lot — a near-zero-cost collar
• You are fully protected below 22,000 for the month
• Your portfolio gains are capped if NIFTY rallies above 23,800

For ₹150 of net premium, the portfolio absorbs no loss below 22,000. The trade-off is forgoing gains above 23,800. In months where the market stays flat or rises moderately, the collar is nearly free.

When a NIFTY hedge fails to fully protect

NIFTY puts hedge systematic market risk — the broad index falling. They do not protect against:

• Stock-specific risk. If one of your holdings falls 30% due to a company event (fraud disclosure, earnings miss, SEBI action) while NIFTY is flat, your put hedge gains nothing.
• High-beta portfolios. If your portfolio falls 25% while NIFTY falls 15%, your NIFTY puts only offset the 15% index move — you still absorb the remaining 10% excess loss.
• Sector concentration. A portfolio heavy in banking, IT, or pharma may diverge significantly from the NIFTY 50 during sector-specific moves.

For concentrated portfolios, stock-specific puts (where liquid on NSE) or sector ETF puts provide more accurate protection. Check the open interest data to assess liquidity at your target strikes before committing to stock-specific hedges.

Common mistakes

• Buying puts too far OTM (e.g., 15–20% OTM) expecting them to function as meaningful portfolio protection — at that distance, even a 10% NIFTY fall leaves the puts worthless.
• Hedging only briefly before a feared event and removing the hedge immediately after — a major correction often continues for weeks, not hours, after the initial trigger.
• Ignoring beta when calculating lot count, leading to a significantly under-hedged position on high-beta portfolios.
• Rolling the hedge at the last minute on expiry day when IV has already spiked, paying excessive premium to establish the new hedge.
• Treating the hedge cost as pure waste — premium paid for insurance that was not needed is the price of the risk management, not a failed trade.

Frequently asked questions

How many NIFTY lots do I need to hedge a ₹10 lakh equity portfolio?

For a beta-1 portfolio with NIFTY at 23,000 and lot size 75: one lot covers ₹17.25 lakh notional, which slightly over-hedges a ₹10 lakh portfolio. Round to 1 lot. For a beta-1.2 portfolio, you still need 1 lot (1.2 × 0.58 ≈ 0.70, rounds to 1). Always apply the beta adjustment before rounding.

How long should I buy puts for when hedging?

For event-specific protection, buy puts that cover the date of the event plus a few days. For ongoing portfolio protection through a volatile period, monthly puts strike the best balance between cost and decay rate. Longer-dated puts decay more slowly but cost more upfront.

Does a NIFTY put hedge work for individual stock portfolios?

A NIFTY put hedge works best for diversified portfolios tracking the broad index. For concentrated or high-beta stock portfolios, NIFTY puts provide only partial protection — the stocks may fall more than NIFTY itself. Stock-specific puts or sector hedges provide more accurate protection in those cases.

What is the cost of a typical NIFTY put hedge?

An ATM NIFTY monthly put at India VIX around 15 may cost roughly 1.5–2.5% of the notional value per lot. A 5% OTM put may cost 0.4–0.8%. Over a full year of continuous hedging, total cost can reach 4–8% of portfolio value — which is why many investors use collars or bear put spreads to reduce net cost.

Keep learning

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• Trading with India VIX
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