Why Your NIFTY Futures Hedge Never Perfectly Offsets Your Losses
A NIFTY futures hedge rarely offsets portfolio losses perfectly because of beta mismatch, basis risk, coarse lot sizes and rollover costs. Sizing the hedge with portfolio beta and rebalancing monthly closes most of the gap.
You hold 50 lakh rupees in Indian dividend-investing/dividend-income-5-lakh-portfolio">blue-chip stocks. The chart is looking weak, so you short one nifty-and-sensex/use-nifty-index-derivatives-hedging-stock-portfolio">Nifty futures lot to protect the portfolio. The next week the index falls 5%. Your stocks are down 2.5 lakh. Your hedge is up 1.8 lakh. You are still 70,000 rupees poorer. What went wrong?
A NIFTY futures hedge almost never offsets losses perfectly, even when the math looks clean on paper. Four quiet forces eat into the protection you thought you bought. Once you understand them, you can size your hedge better and stop being surprised.
Why a NIFTY futures hedge rarely matches your losses
Think of a hedge like an insurance policy on a car. The policy pays if you crash — but only for the specific damages listed, at a specific value, minus a deductible. Hedging in the stock market works the same way. The futures contract pays based on one index, the Nifty 50. Your portfolio is full of other things: mid-caps, small-caps, different sectors, different weights. The two sides move together, but not step for step.
The gap between "your loss" and "your hedge payoff" is called factsheet-index-fund-checklist">tracking error. It comes from four sources.
The four reasons your hedge leaks money
1. Beta mismatch
Beta measures how sensitive a stock is to the index. A utility share might have a beta of 0.7 — it falls less than the Nifty. A private-sector bank might have a beta of 1.3 — it falls more. If your portfolio beta is 1.2 and you hedge at a 1.0 ratio, you under-hedge by 20%. When the market drops, your losses outrun the futures gain.
2. Basis risk
The currency-and-forex-derivatives/basis-risk-currency-hedging">futures price and the spot Nifty price are almost never equal. Futures trade at a premium or discount based on interest rates and dividends. This gap is called the basis. As expiry approaches, the basis converges to zero, but the path is not smooth. You can lose money from basis movement even on a perfectly flat index.
3. Lot size is a coarse instrument
One Nifty futures lot equals a fixed notional value (mcx-and-commodity-trading/lot-size-mcx-commodity-trading-matter">lot size times index level). If your portfolio is 47 lakh, you cannot hedge exactly that amount. You hedge slightly more or slightly less. The leftover is always exposed.
4. Rollover and cost of carry
Futures expire on the last Thursday of every month. If you want protection beyond that date, you must sell the near-month contract and buy the next one. The next month usually trades at a premium, so every rollover has a small cost. Hedge for three months and the rollovers add up.
Example: A 50 lakh portfolio with beta 1.2 hedged with one Nifty lot (roughly 15 lakh notional) offsets only about 36% of the fall. The "insurance" was always partial.
How to build a hedge that actually works
Perfect hedges do not exist. Better hedges do. Four steps help.
- Calculate portfolio beta first. Weight-average the beta of each holding. Tools on any broker platform show this. Without beta, you are flying blind.
- Use the correct hedge ratio. Lots needed equals portfolio value times beta divided by the futures notional. If the math says 1.8 lots, you round to 2. The extra 0.2 is the price of partial protection.
- Pick the right contract. Nifty 50 for large-cap-heavy portfolios. Bank Nifty for bank-heavy. A broader index for a diverse mix.
- Rebalance the hedge monthly. Portfolio beta changes as prices move. A hedge that was right on January 1 may be wrong on January 15.
When options give a cleaner outcome
A long put on the Nifty gives a neater result than a futures short. You pay a premium upfront, but your downside is capped without the basis risk or rollover drag. For smaller portfolios, options-basics/binomial-options-pricing-model">put options are often the better tool. You know the maximum cost before you enter the trade.
Stock-level hedges exist too. If your whole portfolio is banks, a short Bank Nifty future is closer to your actual exposure than a short Nifty future. The closer the hedge matches the underlying, the less leakage you face.
Another option is a vertical put spread. You buy one put and sell another put at a lower strike. This cuts the premium cost sharply and still protects against a normal fall. You give up protection against a crash, but crashes are rare and premiums for full protection are expensive.
Details on contract specifications and expiry rules sit on the NSE site. Read them once. Reread them before every hedge. Small changes in lot size or strike step can change your hedge ratio by enough to matter.
What professional traders accept
Pros do not aim for perfect. They aim for acceptable leakage. A hedge that captures 80-90% of the downside is a win. The remaining slice is the cost of being in the market at all.
If you need zero loss, you need zero equity. The moment you own stocks, something has to move for you to make money — and that same movement can work against you.
A well-built hedge is a seatbelt, not an airbag. It reduces impact. It does not eliminate it. Once you accept that, you stop blaming the tool and start using it properly. The question stops being "why didn't my hedge work?" and becomes "was my hedge sized correctly for my beta?"
Frequently Asked Questions
- Why does my NIFTY futures hedge not cover my full loss?
- Four forces leak value: beta mismatch between your stocks and the index, basis risk between futures and spot, coarse lot sizing, and monthly rollover costs.
- How many NIFTY lots do I need to hedge my portfolio?
- Lots equal portfolio value times portfolio beta divided by the futures notional (lot size times index level). Round up, not down.
- Are put options better than short futures for hedging?
- For smaller portfolios, yes. A long put caps your cost upfront and skips basis risk and rollover drag. Short futures are cheaper but leakier.
- What is basis risk in a NIFTY hedge?
- Basis is the gap between the futures price and the spot index. It moves day to day based on interest rates and dividends, creating unpredictable swings in your hedge payoff.
- How often should I rebalance my hedge?
- At least monthly, and whenever portfolio composition changes meaningfully. Your portfolio beta shifts as prices move, so the old hedge ratio goes stale quickly.