Wall Street’s major indices closed higher on Wednesday, buoyed by a rally in semiconductor stocks that signaled sustained momentum in the artificial intelligence investment cycle.

The gains in chipmakers helped extend a broad-based advance across US equities, with investors interpreting the sector’s strength as confirmation that corporate earnings growth is accelerating beyond the technology bubble.

The S&P 500 is now on track to deliver its best quarterly performance in six years, marking a significant shift from the volatility that characterized much of the previous cycle.

The rally has been supported by a broader-than-expected surge in corporate profits during the second-quarter earnings season, with optimism spreading into sectors that had previously lagged the tech-led advance.

Market strategists note that the resilience of chipmakers is critical to maintaining the current risk-on sentiment.

As long as these companies continue to report record results, the narrative of an AI-driven economic expansion remains intact, providing a floor for equity valuations.