Today’s Overview: The BSE Sensex fell 777.94 points to 74,003.82 and the Nifty 50 dropped 279.50 points to a five-month low of 23,118.60 on September 15, 2026. Brent crude surged to $107.71 a barrel on Gulf supply concerns, pulling down autos and financials. IT shares rallied, while taxpayers met the second advance tax deadline.
Today’s Top Finance & Economy Stories
1. Why Did Sensex Fall 778 Points and Nifty Hit a 5-Month Low on 15 September 2026?
What happened: Indian stock indices fell sharply on Tuesday, extending their weekly declines. The BSE Sensex fell 777.94 points (-1.04%) to 74,003.82, while the Nifty 50 dropped 279.50 points (-1.19%) to 23,118.60, marking its lowest closing level in five months. Bank Nifty slid 811.80 points (-1.43%) to 55,794.75.
Why it matters: Surging international energy prices and rising US Treasury bond yields triggered institutional selling across banking and automotive shares. If you want to calculate your average purchase price across market corrections, use our Stock Average Calculator, or maintain steady long-term compounding with our SIP Calculator.
Key Takeaway: Surging crude oil and foreign fund outflows pushed the Nifty 50 down to a five-month low of 23,118.60.
2. Why Did Brent Crude Surge to $107.71 and What Does It Mean for India?
What happened: Brent crude oil rose 1.92% to trade at $107.71 a barrel on Tuesday, touching intraday peaks near $108. Escalating military tensions between the US and Iran, along with threats to commercial oil tankers passing through the Strait of Hormuz, drove global supply fears. The Indian Rupee weakened to 95.96 against the US dollar.
Why it matters: High crude prices increase India’s import bills and raise transport fuel expenses, raising costs for logistics, aviation, and paint companies. To check how sustained price rises reduce your family’s savings power over time, use our Inflation Calculator.
Key Takeaway: Brent crude climbed towards $108 a barrel, raising fuel import costs and pushing the Rupee to 95.96 per US dollar.
3. Why Did IT Stocks Rally While Banks and Autos Dropped?
What happened: Software exporters bucked the market trend on Tuesday: Infosys jumped 3.79% to ₹1,077.00, HCL Technologies gained 2.40% to ₹1,236.00, and TCS rose 1.85% to ₹3,410.00. Airline operator IndiGo fell 3.85% to ₹4,620.00 on fuel price spikes, while automaker M&M dropped 2.95% to ₹2,840.00.
Why it matters: A weaker Rupee helps Indian IT exporters because they earn revenue in US dollars. Meanwhile, higher fuel costs hurt airlines and consumer auto sales. For homebuyers comparing loan repayments and interest rates across major lenders, check your monthly payments with our Home Loan EMI Calculator.
Key Takeaway: A weaker Rupee supported a rally in IT export stocks, but airlines and auto manufacturers fell on high fuel costs.
4. Statutory Tax Due Date: Second Installment of Advance Tax Due on 15 September 2026
What happened: Tuesday, September 15, was the statutory deadline for individuals, self-employed professionals, and businesses to pay their second installment of Advance Tax for the financial year. Taxpayers whose net tax liability exceeds ₹10,000 must deposit at least 45% of their total estimated tax by today.
Why it matters: Failing to deposit 45% of tax by September 15 triggers mandatory 1% monthly interest charges under Section 234C of the Income Tax Act. To compare your tax obligations under both tax regimes and choose deductions, run your numbers on our Old vs New Tax Regime Calculator.
Key Takeaway: Taxpayers had to pay 45% of their estimated annual tax by September 15 to prevent mandatory interest penalties.
5. Macro Shield: India’s Foreign Exchange Reserves Hit a Record $785.7 Billion
What happened: Official data from the Reserve Bank of India confirmed India’s foreign exchange reserves jumped by $44.903 billion to a record high of $785.706 billion for the week ended September 4. The previous week’s total stood at $740.803 billion.
Why it matters: A foreign exchange buffer of $785 billion provides over 12 months of import cover, allowing the central bank to intervene in currency markets and smooth out Rupee volatility caused by global energy price spikes. For investors planning step-by-step savings for future goals, test your targets with our Step-Up SIP Calculator.
Key Takeaway: Foreign exchange reserves reached an all-time record of $785.7 billion, strengthening India’s currency defense.
Comprehensive Finance, Policy & Market Updates
Regulatory, Macro & Commodity Updates
- Advance Tax Deadline: September 15 was the due date for the second installment of advance tax (45% of total estimated tax).
- Forex Reserves Surge: RBI data showed India’s foreign exchange reserves climbed by $44.9 billion to a record $785.706 billion.
- Crude Oil Jumps: Brent crude touched $107.71 a barrel amid escalating US-Iran geopolitical tension in the Strait of Hormuz.
- Currency Moves: The Rupee weakened to 95.96 against the US dollar as oil refiners bought dollars to settle energy shipments.
- Bullion Spot Prices: Domestic 24K retail gold traded at Rs 1,50,800 per 10g, while silver held near Rs 2,38,000 per kg.
Corporate & Stock Buzzers
- Infosys: Jumped 3.79% to ₹1,077.00, leading Nifty 50 gainers on tech sector buying.
- HCL Technologies: Gained 2.40% to ₹1,236.00 as export-focused software providers advanced.
- TCS: Added 1.85% to ₹3,410.00, finding buying support on dollar earnings strength.
- HDFC Bank: Rose 1.17% to ₹716.55, showing resilience against broader private banking weakness.
- IndiGo: Dropped 3.85% to ₹4,620.00 on rising aviation turbine fuel costs.
- M&M: Fell 2.95% to ₹2,840.00, leading losses across automotive manufacturers.
- BEL: Slipped 3.40% to ₹301.80 on profit taking after recent gains.
Market & Macro Snapshot
Market figures reflect official closing numbers on 15 September 2026. Indicative 24K retail gold was Rs 1,50,800 per 10g and silver was Rs 2,38,000 per 1kg. Retail rates vary across cities because of local taxes and jeweller making charges.
Top Gainers & Losers Nifty 50, 15 September 2026
â–² Top 5 Gainers
- Infosys +3.79%
₹1,077.00 | Led Nifty gainers as software exporters advanced.
- HCL Technologies +2.40%
₹1,236.00 | Buying interest in large-cap IT services.
- Tata Consultancy Services +1.85%
₹3,410.00 | Supported by currency tailwinds from a weaker Rupee.
- Tech Mahindra +1.50%
₹1,564.00 | Continued buying in IT exporters.
- HDFC Bank +1.17%
₹716.55 | Held gains against broader banking weakness.
â–¼ Top 5 Losers
- InterGlobe Aviation (IndiGo) -3.85%
₹4,620.00 | Led decliners as crude oil touched $108 a barrel.
- Bharat Electronics (BEL) -3.40%
₹301.80 | Profit taking following recent sector rallies.
- Mahindra & Mahindra -2.95%
₹2,840.00 | Dropped on fuel cost and auto demand concerns.
- Titan Company -2.65%
₹3,180.00 | Discretionary retail consumer stock consolidation.
- Bajaj Finserv -2.50%
₹1,745.00 | Non-banking financial shares faced selling.
Advance Tax Second Installment
Meaning: The Second Installment of Advance Tax is the payment deadline occurring on September 15 of every financial year, where taxpayers whose estimated annual tax liability exceeds ₹10,000 must deposit at least 45% of their total tax liability.
Example: Taxpayers deposited 45% of their estimated income tax on 15 September 2026 to prevent 1% monthly interest charges under Section 234C.
Frequently Asked Questions
Why did the Sensex drop 778 points on 15 September 2026?
The Sensex dropped 777.94 points (-1.04%) to 74,003.82 as Brent crude rose to $107.71 a barrel amid Middle East shipping risks, triggering selling in auto and banking shares.
Why did IT stocks gain while the broader market fell?
IT exporters like Infosys (+3.79%) and HCL Tech (+2.40%) gained because a weaker Rupee (95.96/USD) increases the rupee value of dollar export earnings.
What was India’s forex reserve total reported by the RBI?
The RBI reported India’s foreign exchange reserves rose by $44.9 billion to reach an all-time record of $785.706 billion for the week ended September 4, 2026.
Upcoming Market & Economic Events to Watch
- US Federal Reserve Meeting: Global interest rate decision and economic forecast scheduled for Wednesday.
- Middle East Shipping: Commercial tanker navigation reports in the Strait of Hormuz.
- GST Return Deadline: GSTR-3B monthly filing deadline approaching on September 20.
Plan Your Financial Strategy with PlanMyReturns Tools
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- Old vs New Tax Regime Calculator: Compare your income tax bill under both tax slabs
- Inflation Calculator: Check how future prices change the purchasing power of your money
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