The latest AI stocks news is hard to ignore. Last week the tech-heavy Nasdaq fell 4.48%, its sharpest weekly drop since June, as investors worried about debt-funded AI data centres, new competition from China and doubts over how fast AI revenue is growing. For readers following the Indian share market, the story has a twist: while Wall Street’s AI trade wobbled, the Sensex and Nifty finished the week higher. This guide explains what happened, why it happened and what to watch next.
Key takeaways
- Wall Street: The Nasdaq slid 4.48% and the S&P 500 about 1.95% last week, while the Dow edged up 0.67%.
- Chips and AI cloud stocks took the hit: The Philadelphia Semiconductor Index fell 11.4%, and AI cloud names such as CoreWeave and Nebius dropped about 25% for the week.
- India held up: The Sensex gained 3.11% to 74,729.27 and the Nifty 50 rose 2.78% to 23,146.15 for the week, with Nifty IT up more than 3% on Friday.
- Next test: Third-quarter earnings from Meta, Tesla and chip-equipment makers such as Lam Research and Texas Instruments this week.
What happened to AI stocks last week
AI-linked shares dominated market headlines. According to Reuters, the Nasdaq’s 4.48% weekly loss and the S&P 500’s 1.95% decline were their deepest since June. Friday, 16 October, was especially rough: CoreWeave slid about 12% and Broadcom also came under pressure, while a jump in oil prices made traders cautious going into the weekend.
Money rotated out of tech and into other corners of the market. Six of the S&P 500’s 11 sectors rose on Friday, led by energy (+2.47%) and utilities (+1.4%). The damage was concentrated: the S&P 500 was still up roughly 12% in 2026, but most of that gain came from AI-related stocks, while the typical index member had gained only about 6%.
Why AI stocks are falling: four pressure points
1. Debt-funded AI infrastructure
Companies building AI data centres have borrowed heavily. CoreWeave, which carries about $50 billion of debt, saw the cost of insuring its five-year debt hit a record high last week. The fear, as Reuters put it, is that debt-laden AI infrastructure firms may not turn profits in time to repay lenders, especially if borrowing costs rise. Strategists also pointed to a higher cost of capital and growing scrutiny of circular financing arrangements inside the AI industry. Nvidia CEO Jensen Huang tried to calm nerves by voicing optimism about CoreWeave.
2. Competition from China in memory chips
Memory stocks were hit after reports that China’s ChangXin Memory Technologies (CXMT) is closer to a denser DRAM design, which could eventually change the memory supply picture. South Korea’s Kospi, which is heavy in memory makers, fell sharply (Schwab put the weekly drop at 14%) and opened Monday another 3.17% lower.
3. Questions about AI revenue
Earlier in October, a Financial Times report suggested OpenAI’s annualised revenue was running about $20 billion below what investors had assumed, according to CNBC’s Investing Club. AI shares reversed when Bloomberg later reported that OpenAI expects annualised revenue of at least $70 billion by year-end. The back-and-forth shows how quickly sentiment can flip, even though demand for computing power remains strong.
4. Oil prices, inflation and borrowing costs
Warm inflation data and rising oil prices added to the pressure. Rob Haworth of U.S. Bank Wealth Management noted that high oil prices tend to pull down the price-to-earnings multiples investors are willing to pay for stocks, which hurts expensive AI names the most.
How the AI selloff affected the Sensex and Nifty
India has few listed AI-hardware leaders, so some analysts argue a global AI correction can actually improve its relative appeal. That is what played out on Thursday, 15 October, when the Sensex jumped 1,533.72 points (2.11%) to 74,315.61 and the Nifty 50 gained 1.66% to 22,997.35. Geojit’s Vinod Nair said the global tech selloff pushed investors toward domestic large-cap technology stocks, private financials and defensive shares.
On Friday the Sensex rose 0.56% to 74,729.27 and the Nifty added 0.65% to 23,146.15, led by a gain of more than 3% in Nifty IT. For the week, the Nifty rebounded about 860 points from a low of 22,288.45 and finished 2.78% higher, according to Religare Broking’s Ajit Mishra.
The IT rebound matters because Indian IT stocks were hammered earlier this year. In February, the ten Nifty IT constituents lost about $68.6 billion in market value, and the index fell 21%, its worst month in nearly 23 years, on fears that AI automation tools from US firms could squeeze pricing and billable hours (Reuters).
On Monday, 19 October, Asian markets were weaker: the Kospi opened 3.17% lower, the Nikkei fell about 1.7% in early trade and Taiwan’s Taiex dropped 1.42%. GIFT Nifty, however, pointed to a positive start for Indian indices.
Sector scorecard: who gained and who lost
- Semiconductors and memory: The biggest losers, with the Philadelphia Semiconductor Index down 11.4% for the week.
- AI cloud providers: CoreWeave and Nebius fell about 25%, and credit markets flagged stress.
- Tech hardware: Dell Technologies was among the names with sharp declines, and Broadcom fell 4.5% on Friday.
- Energy and utilities: Gained as investors moved to safer, defensive areas.
- Indian IT services: Rebounded after the earlier slump, with Nifty IT up more than 3% on Friday.
What to watch this week
- Big-tech earnings: Meta, a heavy spender on AI data centres, reports alongside Tesla, Procter & Gamble, Lam Research and Texas Instruments.
- Earnings growth: Analysts surveyed by LSEG expect third-quarter earnings for S&P 500 companies to jump more than 30%, driven by AI-linked megacaps.
- Credit and financing: Further moves in CoreWeave’s shares and credit-default swaps will show whether financing fears are spreading.
- Oil and yields: Higher oil prices and bond yields can keep pressure on expensive growth stocks.
- Sensex levels: Choice Equity Broking sees support near 73,900–74,100 and resistance around 75,000–75,300.
What should investors keep in mind?
This is general information, not a recommendation. Strategists are split on what the selloff means. UBS described it as a reset in expectations rather than a break in the AI story and suggested focusing on where AI spending turns into lasting earnings. Deutsche Bank had warned on 9 October that the rotation into tech had run far and that near-term risk-reward looked less favourable. CNBC’s Investing Club team made a related point: many people treat AI as a short-term trade rather than a long-term investment, and that is when sharp swings hurt most.
Practical takeaways: avoid reacting to a single day’s move, check how much of your portfolio (including mutual funds and ETFs) is tied to the same AI theme, and look at debt levels and earnings, not just headlines.
Frequently asked questions
Why are AI stocks falling?
Last week’s selloff was driven by concerns over heavy borrowing to build AI data centres, reports of Chinese progress in memory chips, mixed signals on OpenAI’s revenue, and rising oil prices and borrowing costs.
Is the AI bubble bursting?
Nobody can say for sure. Some strategists see a healthy reset, while others warn that valuations and debt levels leave little room for error. Upcoming earnings should give clearer evidence.
How does the AI selloff affect the Sensex and Nifty?
India is less exposed to AI hardware stocks, so the Sensex and Nifty rose last week even as the Nasdaq fell. But global risk sentiment, foreign flows and oil prices can still move Indian markets.
Which Indian stocks are most exposed to AI news?
Large IT services companies, including Infosys, TCS, HCLTech and Tech Mahindra, have been hit by AI-disruption fears earlier in 2026, so they tend to react sharply to AI headlines. This is not a buy or sell call.
Disclaimer
This article is for educational and informational purposes only and is not investment advice or a recommendation to buy or sell any security. Market figures are as reported between 15 and 19 October 2026 and may have changed. Please consult a SEBI-registered investment adviser before investing.