Nifty 50 Rejig Explained: BSE Ltd Replaces Wipro, Why Stocks Often Move After Index Entry or Exit and What the Flows Mean

The Nifty 50 rejig is complete, and the first lesson is that the stock that joined fell while the stock that left rose. The Nifty 50 has held BSE in place of Wipro since the 29 September close, and Wipro has moved to the Nifty Next 50. That reversal is a common feature of passive-fund trading around an index rejig.

If you are searching for what happens after stocks enter or exit an index, this article explains the semi-annual Nifty 50 rejig rules and the free-float market capitalisation test, why the BSE Wipro switch happened, how passive funds and ETFs trade, what Nuvama and Goldman Sachs flows showed around the effective date and what investors should take from it.

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What Is the Nifty 50 Rejig and Why Does It Happen?

NSE Indices runs the Nifty 50 rejig every six months and swaps constituents when a company outside the index becomes clearly larger than one inside it. The test uses average free-float market capitalisation over six months and trading liquidity, and only stocks in NSE's futures and options segment qualify.

A new stock must have an average free-float market capitalisation at least 1.5 times that of the smallest existing constituent. That rule prevents frequent changes around a marginal gap and keeps the index stable.

BSE Replaces Wipro in the Nifty 50 Rejig: The Key Facts

Detail	Nifty 50 rejig, September 2026
Stock entering	BSE Ltd, from the Nifty Midcap 150
Stock leaving	Wipro, to the Nifty Next 50
Effective date	30 September 2026, based on the close of 29 September
BSE six-month average free-float market cap	About Rs 1,40,879 crore
Wipro six-month average free-float market cap	About Rs 55,930 crore
Eligibility threshold	At least 1.5 times the smallest constituent
Other candidates	HDFC Life (Rs 65,666 crore) and Tata Consumer (Rs 73,054 crore) fell short of the threshold

NSE announced the Nifty 50 rejig decision on 10 August, which gave passive funds, ETFs and derivatives desks about seven weeks to prepare.

Other Index Changes in the September 2026 Nifty 50 Rejig

Index	Entering	Leaving
Nifty 50	BSE	Wipro
Nifty Next 50	Hitachi Energy India, Polycab India, Vedanta Aluminium, Vodafone Idea, Wipro	Indian Hotels, Lodha Developers, REC, Shree Cement, United Spirits
Nifty Midcap 150	13 stocks	BSE, which moves up to the Nifty 50

The same Nifty 50 rejig also brought five additions and five exits in the Nifty 100. The Nifty 50 Equal Weight index carried the same BSE Wipro swap.

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What Happens After a Nifty 50 Rejig for Entering and Exiting Stocks?

In any index rejig, index funds and ETFs that track the Nifty 50 must hold each stock at its index weight, so they buy new entrants and sell exits at the close before the effective date. Active funds that benchmark to the index also adjust, and derivatives traders hedge the flows.

Stage	What usually happens to an entering stock	What usually happens to an exiting stock
Before the effective date	Buying by traders who expect passive demand can lift the price	Selling and short positions can weigh on the price
At the effective close	Index funds buy in size	Index funds sell in size
After the effective date	Passive demand is over, so early buyers may take profits	Selling pressure ends and the stock can recover

This Nifty 50 rejig pattern is common but not guaranteed. The reaction depends on the size of the flows, the starting valuation, who is positioned and the market backdrop.

How BSE and Wipro Traded Around the Nifty 50 Rejig

Date	BSE Ltd	Wipro
29 September (before effective date)	Up 3.3%	Down 2.9% to about Rs 156.79
30 September (effective date)	Fell 2.5% to 3.7% intraday and closed near Rs 3,092	Rose 1.1% to Rs 158.50
1 October	About Rs 3,097 to Rs 3,117	About Rs 159

BSE's fall after the Nifty 50 rejig came as institutional holders including Goldman Sachs and BNP Paribas sold 6.83 million shares worth Rs 2,186 crore. UTI Mutual Fund and Nippon India Mutual Fund bought 5.24 million shares and absorbed much of it. Nuvama estimated inflows of about $668 million for BSE and about $230 million for Wipro, as reported.

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What the Nifty 50 Rejig Means for Investors

Index entry is not a business event: Joining the Nifty 50 does not change BSE's earnings, and leaving it does not hurt Wipro's operations.

Flows move prices briefly: Passive buying and selling around a Nifty 50 rejig can push a stock for days, but fundamentals reassert themselves afterwards.

Visibility and liquidity improve: A larger set of funds must hold the stock, which can deepen trading over time.

Chasing run-ups is risky: BSE rose 3.3% the day before the effective date and then fell as holders sold into the demand.

What Should Investors Watch After the Nifty 50 Rejig?

1. Whether BSE holds its post-rejig range or slides further as active holders trim.
2. How Wipro trades in the Nifty Next 50, where funds now hold it.
3. The next Nifty 50 rejig, announced about seven weeks before its March 2027 effective date.
4. Quarterly results from BSE and Wipro, which matter more than the index change.

Conclusion

The Nifty 50 rejig put BSE Ltd into the index and moved Wipro to the Nifty Next 50 from 30 September 2026, after BSE's free-float market capitalisation of about Rs 1.41 lakh crore passed the 1.5-times test. BSE fell and Wipro rose once passive buying and selling were done, which is a common but not certain pattern. Nifty 50 rejig changes move prices briefly, but results and valuation decide the longer trend. Consult a SEBI-registered advisor before making any decision.

Frequently Asked Questions

Which stock replaced Wipro in the Nifty 50?

Ans. BSE Ltd replaced Wipro in the Nifty 50 from 30 September 2026. Wipro moved to the Nifty Next 50.

Why did BSE replace Wipro in the Nifty 50?

Ans. BSE's six-month average free-float market capitalisation of about Rs 1.41 lakh crore was more than 1.5 times Wipro's Rs 55,930 crore. NSE Indices applies this test in its semi-annual review.

When did the Nifty 50 rejig take effect?

Ans. The change took effect on 30 September 2026, using the close of 29 September. NSE Indices announced it on 10 August.

What happens to a stock after it joins the Nifty 50 in an index rejig?

Ans. Index funds buy it at the effective close, which can lift the price beforehand. Afterwards, early buyers often take profits, and BSE fell 2.5% to 3.7% on 30 September.

What happens to a stock after it exits the Nifty 50?

Ans. Index funds sell it at the effective close, which can weigh on the price beforehand. Wipro rose 1.1% on 30 September once the Nifty 50 rejig selling ended.

How much money moved because of the Nifty 50 rejig?

Ans. Nuvama estimated inflows of about $668 million for BSE and about $230 million for Wipro, as reported. Goldman Sachs and BNP Paribas sold BSE shares worth Rs 2,186 crore.

Which other stocks changed in the Nifty Next 50?

Ans. Hitachi Energy India, Polycab India, Vedanta Aluminium, Vodafone Idea and Wipro entered. Indian Hotels, Lodha Developers, REC, Shree Cement and United Spirits left.

Should I buy stocks before they enter the Nifty 50?

Ans. This article does not constitute investment advice. Prices often rise before a Nifty 50 rejig entry and fall after it, but the pattern is not reliable. Consult a SEBI-registered financial advisor before investing.