Sensex Today: Nifty Reclaims 23,400 as Markets Find Relief; Why Lenskart and Anupam Rasayan Are Falling

Indian stock markets started the week on a firmer note on September 21, 2026, with the Nifty 50 reclaiming the 23,400 mark and the Sensex gaining more than 400 points in morning trade. However, the broader market picture remained mixed as some individual stocks, including Lenskart Solutions and Anupam Rasayan, came under selling pressure following large block deals.

The early session offered an interesting contrast: benchmark indices were moving higher, while certain stocks were falling sharply because of company-specific transactions.

At the opening, the Sensex gained 405.67 points, or 0.55%, to 74,700.63, while the Nifty rose 34.45 points, or 0.15%, to 23,380.85. Later, the Nifty moved above 23,400 as buying broadened across several sectors.

What is driving the Sensex and Nifty higher?

One of the biggest sources of relief for Indian equities has been the recent easing in crude oil prices.

Brent crude futures declined about 2.2% to around $101.6 a barrel amid expectations of improving Saudi oil shipments. Although oil remains elevated, the decline reduced some of the immediate pressure on oil-importing economies such as India.

This matters because expensive crude can affect several parts of the Indian economy.

Why does crude oil matter to the stock market?

India imports a substantial portion of its crude requirements. A sustained rise in oil prices can potentially:

• Increase the country's import bill
• Put pressure on the rupee
• Increase inflationary risks
• Raise transportation and input costs for businesses
• Complicate the interest-rate outlook
• Affect corporate profit expectations

Therefore, even a moderate fall in crude can provide some relief to equity investors.

However, crude is still above $100 a barrel, meaning the risk has not disappeared.

Nifty crosses 23,400: Why this level matters

The Nifty's move back above 23,400 is significant mainly because it shows that buyers were willing to step in after a prolonged period of weakness.

The index had recently suffered six consecutive weekly declines, its longest such losing streak in roughly six years.

That makes Monday's recovery noteworthy, but one strong session by itself does not establish a long-term trend.

For traders and investors, the key question is whether buying interest can continue beyond the initial rebound.

Which sectors are supporting the market?

The morning rally was relatively broad, although IT and PSU banking stocks were among the weaker pockets.

Moneycontrol's live market data showed gains in areas including realty, FMCG and pharma, while Nifty IT and PSU Bank were trading lower.

Several heavyweight stocks also supported the benchmark indices.

InterGlobe Aviation, Reliance Industries, Sun Pharma, HDFC Life and M&M were among the notable gainers mentioned in the morning market updates.

This shows why index movement and individual stock performance can look very different on the same trading day.

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Lenskart Falls After Large Block Deal: What Happened?

One of Monday's most closely watched stock-specific developments was Lenskart Solutions.

Around 3.6 crore Lenskart shares, representing approximately 2.07% of the company's equity, changed hands through block deals at ₹688 per share. The transaction was valued at about ₹2,468 crore.

Following the transaction, Lenskart shares came under pressure during morning trading.

Earlier reports had indicated that Platinum Jasmine A 2018 Trust was likely to sell up to 3 crore shares, equivalent to around 1.7% of Lenskart, with a reported floor price of ₹682.45 per share.

What is a block deal?

A block deal is a large transaction involving a substantial number of shares that is executed through a special trading window.

It does not automatically mean that a company's business fundamentals have deteriorated.

A large shareholder may sell shares for several reasons, including:

• Portfolio rebalancing
• Profit booking
• Raising cash
• Changing investment allocation
• Partial exit by an early investor

Therefore, investors need to distinguish between selling by a shareholder and selling caused by deterioration in the company's underlying business.

In Lenskart's case, the immediate market reaction was negative because a large quantity of shares entered the market through the transaction.

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Anupam Rasayan Also Under Pressure

Another stock affected by a block transaction was Anupam Rasayan India.

Around 15.44 lakh shares, representing about 1.41% of the company's equity, changed hands at ₹1,170 per share in a transaction worth approximately ₹180 crore.

The stock was trading around ₹1,168.20 in morning trade, down about 3.11%.

An especially notable feature was the surge in trading volume. The stock's reported volume was substantially above its five-day average during the session.

Why can a stock fall after a block deal?

The market reaction depends on the circumstances surrounding the transaction.

If a large investor sells shares at or near the market price, investors may temporarily worry about additional supply entering the market.

At the same time, the buyer could have a completely different view of the company.

This is why a block deal should generally be viewed as a market-structure event first, rather than automatically interpreting it as a verdict on the company's future.

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Market Rally vs Stock-Specific Selling: The Bigger Picture

Monday's trading session demonstrates an important feature of equity markets.

The Sensex and Nifty can rise even when several individual stocks are falling sharply.

This happens because benchmark indices are influenced by the combined performance of their constituents, with larger companies having greater influence on index movement.

Therefore:

Index rises ≠ every stock rises

and

Individual stock falls ≠ entire market is weak

This distinction is particularly important on days when large block deals, corporate announcements or company-specific developments create unusual movements in individual shares.

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What Investors Are Watching Now

The market's next direction could depend on several moving parts.

1. Crude oil

Oil remains one of the most important external variables for Indian equities. The recent decline has provided some relief, but prices remain elevated above $100 a barrel.

2. Foreign investor flows

Foreign institutional flows remain important because persistent overseas selling can place pressure on Indian equities even when domestic investors remain active.

3. Global markets

Asian markets were trading higher in early Monday trade, providing a supportive external backdrop for Indian equities.

4. Geopolitical developments

The continuing US-Iran tensions remain a major source of uncertainty for oil prices and global risk sentiment.

5. Primary-market activity

India's IPO market is also absorbing investor liquidity, with the National Stock Exchange's large IPO scheduled to close for subscriptions on Monday.

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What Monday's Market Move Really Tells Us

The early rally in Indian equities is being supported by easing crude prices, improved global cues and buying across several sectors.

But the Lenskart and Anupam Rasayan moves show why investors should not read the entire market through the movement of the Sensex alone.

A benchmark can recover while individual companies experience sharp volatility because of block deals or other company-specific developments.

For investors, the important distinction is between market-wide factors such as crude, global sentiment and fund flows, and stock-specific factors such as large shareholder transactions.

The market will therefore remain sensitive to both macroeconomic developments and company-level news as trading progresses on September 21.

Disclaimer: This article is for informational purposes only and does not constitute investment advice. Stock prices can change rapidly during market hours, and investors should conduct their own research or consult a qualified financial professional before making investment decisions.