Nifty IT Index: Weights and Worked Examples

What the Nifty IT Index Actually Is

The Nifty IT Index tracks 10 NSE-listed IT companies. It is maintained by NSE Indices Limited as a standalone sectoral index, rather than a sub-index calculated from the Nifty 50 alone. Membership follows the index methodology, not just a ranking of all IT companies by total size.

The index uses capped free-float market capitalisation: weights reflect publicly available share value, subject to index limits. Its basket is reviewed semi-annually. The table below is a dated official snapshot; the separate contribution example uses fictional weights.

For a trader, the index is a sector thermometer. Earnings, currency changes and customer-demand expectations may influence IT share prices, but an index move cannot be attributed to one of these causes from price alone.

Constituents and Weights in the Dated Factsheet

The following weights come from the NSE Indices factsheet dated 30 September 2026, opened 16 Oct 2026. They are not live weights or illustrative ranges. Prices and later rebalancing can change them.

Infosys has the larger weight in this dated snapshot. Free-float weighting and index caps mean total company market value alone does not establish an index weight. Do not infer a current promoter percentage from the weighting table.

A Worked Example: How a TCS and Infosys Move Drives the Index

This is the core of understanding Nifty IT. Because two stocks dominate, you can estimate the index move from their moves. The contribution of a stock to the index move is roughly its weight multiplied by its percentage move. Let us work a fully illustrative example. Assume the Nifty IT Index is at 38,000. Infosys is weighted at 27% and TCS at 20%. These are made-up weights for the calculation, separate from the dated factsheet.

Suppose on results day Infosys rises 4% and TCS rises 3%, while the rest of the basket is roughly flat. The index contribution from Infosys is 0.27 times 4% which equals about 1.08%. From TCS it is 0.20 times 3% which equals about 0.60%. Together that is about 1.68% of upward push just from these two names. On a 38,000 index, 1.68% is about 638 points, taking the index to roughly 38,638 even if the other eight stocks did nothing. That is the entire point of calling this index top-heavy. Concentration is not the same as leverage; an unborrowed fund holding does not become leveraged because its weights are concentrated.

A Separate Fictional Stock-Futures Example

Check the actual exchange and product when expressing a sector view. The NSE Indices product page lists Nifty IT derivatives at NSE IX; that is distinct from domestic NSE equity derivatives. A single-company future or option does not replicate the whole IT basket.

For a fictional futures arithmetic example, assume price Rs 1,500 and quantity 400 underlying shares. This is an assumed position quantity, not a verified current Infosys lot. Its contract value is Rs 600,000. Assume the exit futures price is Rs 1,560: a Rs 60 per-share rise, or 4%.

• Example gross profit: (1,560 - 1,500) x 400 = Rs 24,000.
• Example sale turnover: 1,560 x 400 = Rs 624,000.
• Current futures-sale STT at 0.05%: Rs 624,000 x 0.05 / 100 = Rs 312.
• Actual brokerage and other applicable charges are additional; no net total is estimated.

The Rs 24,000 is gross trading profit. Keep the actual position history and broker charges and confirm classification and reporting with a qualified tax adviser; no income-tax or take-home figure is inferred here.

Buying a Nifty IT Fund Without Futures Margin

A fund tracking Nifty IT holds sector exposure without needing a single-stock futures position. Check the specific scheme and share class, its expenses, tracking difference and trading spread. The index level is not the price of a fund unit.

For a separate fictional fund trade, assume an entry at Rs 38 and an exit at Rs 38.64, using 2,000 units. Entry outlay is Rs 76,000; exit proceeds are Rs 77,280; gross gain is Rs 1,280. The exit price is an independent assumption, not a fixed index-to-unit conversion. Applicable charges are additional.

• An unborrowed cash fund purchase has no futures margin requirement, but can still lose substantially.
• Use actual fund prices rather than converting an index level by an assumed ratio.
• Check the specific fund tax classification and holding dates with a qualified adviser.
• Fund units carry expenses and tracking differences; exchange-traded units also have spreads.
• A sector fund remains concentrated in the sector.

What Actually Moves Nifty IT

USD/INR can influence reported IT-company earnings, but currency hedges, cost currencies, contracts and expectations also matter. A weaker rupee does not mechanically increase every company margin or force the index higher.

Customer spending and economic expectations can affect IT companies. Check company disclosures for geographic revenue and demand exposure; this index does not trade overnight on domestic NSE, so its published value cannot move before that session opens.

Company results, revenue guidance and contract announcements can affect the basket. The effect depends on the actual company weight and price reaction; no fixed publication order or percentage impact is assumed.

Nifty IT Versus Other Sectoral Indices

Sector indices cover different business exposures. IT, banks and consumer companies may respond differently to news, but the relationships vary and do not establish a profitable rotation rule.

Assess liquidity in the actual product and expiry. A fund, a stock future and an index option can have different spreads and exposure even when their names suggest the same sector view.

Expiry, SEBI Rules and Margins You Must Know

Checked 16 Oct 2026: NSE stock derivatives follow monthly expiries on the last Tuesday, moving to the previous trading day if it is a trading holiday. Stock options do not have weekly expiries. This differs from Nifty weekly options and from Bank Nifty monthly and quarterly options.

Use the current broker margin estimate for the exact futures or short-option position, and allow for subsequent changes and settlement obligations. A long stock option can create physical-settlement funding or delivery needs near expiry; premium alone does not describe every operational requirement.

• Stock derivatives: monthly Tuesday expiry with the holiday adjustment; confirm the actual date.
• NSE/FATAX/73524 sets futures-sale STT at 0.05% and option-sale STT at 0.15% from 1 April 2026.
• Use actual broker charges and keep supporting records.
• Ask a qualified adviser to confirm tax reporting; no universal loss-carryforward claim is made here.

Common Mistakes Traders Make With Nifty IT

Concentration means a large constituent move can affect the basket materially. Review the whole portfolio and actual weights rather than treating the index as an equal-weighted set of shares. Currency, costs and demand interact; none guarantees the direction.

Avoid treating a gross result as take-home income. Derivatives around results carry gap and margin risk, but neither the largest IV nor the worst price gap can be assumed from the calendar alone.

The constituent weights above are the dated official factsheet. All contribution and trade prices below them are fictional teaching examples, not observed market outcomes.

Sources

• NSE Indices: Nifty IT factsheet, 30 September 2026 (checked 16 Oct 2026)
• NSE Indices: Nifty IT linked products (checked 16 Oct 2026)
• NSE: Contract cycles and expiry days (checked 16 Oct 2026)
• NSE: STT revision (checked 16 Oct 2026)
• NSE Clearing: STT valuation basis (checked 16 Oct 2026)