Index Options vs Stock Options in Indian Markets

What Index Options And Stock Options Actually Are

An option gives the buyer the right, but not the duty, to buy a call or sell a put at a fixed strike price before or on the expiry date. The seller, also called the writer, takes the opposite obligation and collects a premium for it. That core mechanic is identical whether the underlying is an index or a single stock. What changes everything in practice is the underlying asset, and that single difference cascades into settlement, lot size, liquidity, margin and risk.

Index options are written on a market index. In India the heavyweights are the Nifty 50 and Bank Nifty on the NSE, plus FinNifty and the Sensex. An index is a weighted average of many stocks, so no single company earnings shock can blow it up. You cannot hold an index in your demat account, so these contracts are cash settled. At expiry the exchange simply credits or debits the difference between the strike and the settlement value, multiplied by the lot size. There is nothing to deliver.

Stock options are written on one listed company, for example Reliance Industries, HDFC Bank, TCS or Infosys. Because the underlying is a real share that lives in a demat account, the exchange settles these contracts by physical delivery if they expire in the money. A call buyer who holds to expiry takes delivery of the shares, and a call writer must hand them over. This makes single stock options behave very differently in the last few days before expiry.

Lot Sizes That Actually Apply In 2026

The lot size is the fixed number of units in one contract, and it decides how much money moves on every one point change in price. An older or careless guide will tell you the Nifty lot is 75. That is out of date and wrong. After the latest NSE lot-size revision the Nifty 50 lot is 65 units. Getting this number right is not a detail, because using 75 instead of 65 overstates every rupee figure by about 15 percent.

Single stock lot sizes are not uniform. The NSE fixes each stock lot so that one contract is worth roughly a target rupee value, and the exchange revises these lists periodically. So before you trade Reliance or Infosys options you must check the current contract specification on the NSE site rather than assume a number. The lesson is simple. Index lots are well known and fixed, single stock lots vary by company and change over time, and using a stale lot size is one of the fastest ways to size a position wrongly.

Worked Example: A Nifty 50 Call With The Correct Lot Of 75

These numbers are illustrative and used only to show the maths. They are not a prediction and not a promise of returns. Suppose the Nifty 50 is trading near 24,000 and a trader expects a move higher over the next two weeks. The trader buys one weekly 24,200 call at a premium of Rs 90 per unit. Since the Nifty lot is 65, the cost to enter is 90 times 65, which is Rs 5,850, plus charges. That Rs 5,850 is also the maximum the buyer can lose, because an option buyer cannot lose more than the premium paid.

Say the Nifty closes at 24,500 on expiry. The call is now 300 points in the money, since 24,500 minus the 24,200 strike is 300. The contract is cash settled, so the payout is 300 times 75, which is Rs 22,500. Subtract the Rs 6,750 premium already paid and the gross profit is Rs 15,750 before charges. Notice that if you had wrongly used a lot of 50, you would have calculated a payout of only Rs 15,000 and a profit of Rs 10,500, understating the real outcome by 50 percent. The lot size is doing real work here.

Now the costs. On options the Securities Transaction Tax is charged on the sell side. STT on option selling is 0.1 percent of the premium, and there is also STT of 0.125 percent on the intrinsic value of options that are exercised at expiry. On top of that you pay brokerage, which on most discount brokers is a flat amount such as Rs 20 per executed order, plus exchange transaction charges, SEBI fees, stamp duty and 18 percent GST on the brokerage and transaction charges. For a single round trip like this the total of these charges is usually a few hundred rupees, so a Rs 15,750 gross profit might leave roughly Rs 15,000 to Rs 15,400 net. The exact figure depends on your broker, so treat this as an estimate.

Why Settlement Style Changes Your Risk

Cash settlement on index options keeps life simple. Whatever you are owed or owe at expiry is just credited or debited in rupees. There is no demat movement and no surprise margin call for taking delivery. This is a big reason index options dominate Indian volumes and why beginners are usually pointed to them first.

Physical delivery on single stock options is where many new traders get hurt. If you hold a stock call or short a stock put that is in the money near expiry, the system will try to settle by moving actual shares. The full delivery value of the lot, which can be several lakh rupees, has to be funded. Brokers respond by sharply raising the margin required on in the money single stock options in the days before expiry, a process often called physical delivery margin. A position that felt cheap can suddenly demand a large margin or get squared off by the broker.

• Index options: cash settled, no delivery, no demat movement, predictable expiry handling.
• Single stock options: physical delivery if in the money, full lot value must be funded, steep delivery margins in the final days.
• Out of the money options of either type simply expire worthless, and the buyer loses only the premium paid.
• If you do not want delivery on a stock option, close it before the delivery margin window starts, usually a few days before expiry.

Liquidity, Spreads And Expiry Cycles

Liquidity is the quiet factor that decides whether your strategy works in real money. Nifty and Bank Nifty options are among the most actively traded contracts in the world. Order books are deep, bid ask spreads are tight, and you can enter and exit large sizes without moving the price much. Single stock options vary widely. Reliance, HDFC Bank, TCS and a handful of other large names trade reasonably well, but many smaller F&O stocks have thin books where the spread alone can eat a chunk of your edge.

Expiry cycles also differ. After SEBI rationalised weekly expiries, the headline index Nifty 50 carries a weekly expiry plus monthly contracts, which gives traders many short dated choices. Most single stock options offer monthly expiries only. If your strategy depends on short dated weekly options, that choice mostly lives in the index world, not in single stocks.

How Index And Stock Options Are Taxed In India

This is the single most misunderstood part of options, and it is where the old version of this page was wrong. Income from trading both index and stock futures and options is treated as non-speculative business income under Indian tax law. It is not speculative business income, and it is not capital gains. Intraday equity buying and selling of shares is speculative, but F&O is specifically excluded from the speculative definition, so it falls under normal business income.

Because it is business income, your net F&O profit is added to your other income and taxed at your applicable slab rate. The big practical benefit of the non-speculative classification is loss treatment. A non-speculative business loss can be set off against most other heads of income in the same year, except salary, and any unabsorbed loss can be carried forward for 8 assessment years to offset future business profits. A speculative loss, by contrast, can only be set off against speculative gains and only carries forward for 4 years, so the distinction matters a lot at filing time.

Capital gains rules such as STCG at 20 percent and LTCG at 12.5 percent above Rs 1.25 lakh apply to delivery based equity investing, not to your F&O trading. The Securities Transaction Tax you pay on option sells and on exercised options is a transaction cost that reduces your business profit, it is not the same thing as income tax. If your turnover is large, a tax audit under the relevant provisions may apply, so keeping a clean trade ledger is essential.

Margins, SEBI Rules And Position Limits

Buying an option only requires the premium, so a Nifty 24,200 call at Rs 90 costs about Rs 6,750 for one lot and nothing more. Selling options is a different game. As a writer you take on potentially large obligations, so SEBI and the exchanges require you to post span and exposure margin, which can run into lakhs of rupees per lot for index options and even more for some single stocks. SEBI has also moved margin collection to upfront, so the margin must be in your account before the trade, not after.

SEBI also sets position limits and oversight rules to keep the market orderly, monitors for manipulation, and periodically revises lot sizes and expiry structures, as it did with the Nifty lot of 65 and the weekly expiry rationalisation. Always confirm the current contract specifications, margins and expiry calendar on the exchange before you trade, because these rules change and a stale number can cost you.

• Option buying needs only the premium, and the premium is your maximum loss.
• Option selling needs upfront span plus exposure margin, which can be large.
• SEBI sets and revises lot sizes, expiry cycles and position limits, so verify current specs before trading.
• Physical delivery margins on in the money single stock options ramp up in the final days to expiry.

Which One Should You Trade?

There is no single right answer, but the structural facts point you in a direction. If you want tight spreads, weekly expiries, clean cash settlement and the deepest liquidity, index options on Nifty or Bank Nifty are usually the more forgiving starting point. You avoid the delivery surprise entirely, and you can size precisely with the known lot of 75 for Nifty or 15 for Bank Nifty.

Single stock options earn their place when you have a specific view on one company, for example around results or a known catalyst, where you want exposure that the index would dilute. The trade off is thinner liquidity for many names, monthly only expiries, and the physical delivery mechanic you must manage. Many experienced traders use index options for broad market and volatility views and reserve single stock options for high conviction, company specific ideas.

Whatever you choose, the same disciplines apply. Use the correct lot size, account for STT and brokerage in your expected payoff, define your maximum loss before entry, and remember that the tax on your gains is normal slab rate business income. A trading journal that records each trade with its real charges will tell you the truth about your edge over a full year.

Sources And Further Reading

For authoritative contract specifications, lot sizes, margins and expiry calendars, refer to NSE India and SEBI. For tax classification and filing rules, see the Income Tax Department. Always confirm current rules, rates and lot sizes on the official source before you trade, because they change.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to NSE India, SEBI (Securities and Exchange Board of India) and Income Tax Department. Always confirm current rules, rates and contract specifications on the official source before you trade.