Artificial intelligence stocks swung sharply again Tuesday as investors weighed the promise of the technology against the rising cost of building and financing it. Most of the U.S. stock market rose, but uncertainty around AI continued to affect chip companies, cloud providers, and other businesses tied to the boom.
AI shares move markets
The S&P 500 was up 0.3% and the Dow Jones Industrial Average was up 0.7% shortly after trading began, while the Nasdaq Composite gained 0.2%, according to the Associated Press. Because the Nasdaq has more exposure to technology companies, its smaller gain reflected continued pressure on AI-related shares.
The volatility also spread beyond the United States. South Korean AI company Elice fell 32% in its first day of trading, while South Korea’s Kospi index dropped 3.7%. European indexes also fell, adding to the pressure on global technology shares.
Data center costs rise
Investors are questioning whether companies can keep spending at the current pace. AI systems require large data centers and specialized chips. Many companies have borrowed money to buy equipment and expand capacity, making them more exposed to higher interest rates.
CoreWeave, which rents AI computing power through the cloud, briefly fell more than 6% Tuesday. The company has experienced especially large price swings because its business depends on buying expensive AI chips and financing that equipment.
Technology spending faces scrutiny
Even with the market volatility, companies have not stopped investing in AI. They are still spending heavily because they expect the technology to improve productivity. The pressure is on them to show that those investments can produce enough revenue and profit to justify their cost.
For technology companies, the next major test will be whether earnings and customer demand continue to support spending on chips, cloud capacity, and data centers. For investors, the swings show that enthusiasm for AI is now being measured against interest rates, debt, and business results.
References
Choe, S. (2026, October 20). Most of Wall Street rises as AI stocks keep swinging. Associated Press. https://apnews.com/article/stock-markets-oil-ai-rates-inflation-b972b64127db5412a2b02c35ecf95c88