Celestica, Cadence and Rambus Beat Q3 Estimates, But AI Spending Questions Loom

Celestica, Cadence Design Systems and Rambus each topped Wall Street expectations in their latest quarterly reports, but their results raise a bigger question: is the artificial intelligence boom sustainable? Celestica, an electronics manufacturer, posted strong numbers thanks to demand from data-center customers, while chip-design software maker Cadence and chip-interface specialist Rambus also beat forecasts. Together, the three tech-sector earnings reports suggest that AI-related spending is still powering growth for companies that supply the infrastructure behind machine learning. However, investors are increasingly asking how long the surge can last, especially with concerns about overcapacity and slowing cloud capital expenditures. The results matter because they offer an early read on the health of the AI supply chain beyond the big names like Nvidia. If these supporting players continue to outperform, it could signal that the AI buildout has further room to run. But any sign of weakness could foreshadow a broader slowdown. For now, the three companies are benefiting from the AI wave, but the path ahead remains uncertain.