IndiGo Shares Jump Ahead of Sensex Inclusion on December 22 — What the Index Upgrade Means for Investors

Shares of InterGlobe Aviation (IndiGo) surged nearly 2% intraday on Monday as investors reacted positively to the announcement that the airline will officially join the 30-stock BSE Sensex on December 22.

This marks a major milestone for IndiGo, making it the first airline to enter the benchmark Sensex, replacing Tata Motors Passenger Vehicles (TMPV).

📈 IndiGo’s Market Rally Ahead of Sensex Entry

• IndiGo shares opened higher and continued to gain momentum.
• The stock has risen over 28% in 2025 and nearly 9% in the last six months.
• The company now boasts a market cap of ₹2.27 lakh crore.

Meanwhile, Tata Motors Passenger Vehicles, which will exit the index, fell over 1.5% following the update.

🔄 What Changes on December 22?

Starting December 22, the following adjustments will take effect:

Sensex

• IndiGo (InterGlobe Aviation) will replace
  Tata Motors Passenger Vehicles (TMPV).

This reshuffle is part of the regular review conducted by BSE Index Services, which evaluates stocks based on:

• Market performance
• Liquidity
• Eligibility criteria

📊 Other Major Index Changes

Along with the Sensex rejig, several other BSE index adjustments will be implemented:

BSE 100

• IDFC First Bank enters, replacing Adani Green Energy

Sensex Next 50

• IndusInd Bank enters
• IDFC First Bank enters
• Max Healthcare Institute removed
• Adani Green Energy removed

BSE Bankex (effective December 26)

• Canara Bank
• AU Small Finance Bank
• Punjab National Bank (PNB)
• Union Bank of India
  will all be added to the Bankex index.

📉 IndiGo’s Q2FY26 Performance

Despite strong stock momentum, IndiGo reported a net loss of ₹2,582 crore in the July–September quarter, mainly due to forex fluctuations affecting dollar-linked expenses.

• Previous year’s loss: ₹986 crore
• Revenue rose to ₹19,599 crore, compared to ₹17,759 crore last year

📌 What This Means for Investors

• Sensex inclusion typically boosts a stock’s visibility and can attract higher institutional inflows, especially from index funds.
• Analysts expect IndiGo’s weight in the index to drive stronger demand from global and domestic passive investors.
• The airline’s growing market valuation reinforces its dominance in Indian aviation despite temporary financial headwinds.