The Philadelphia Semiconductor Index, better known as SOX, has ripped 50% higher in just 25 trading days. That’s the kind of move that makes portfolio managers spill their coffee and immediately start Googling “dot-com bubble comparison charts.”
As of May 6, 2026, the index has breached the 10,000-point level, marking its strongest rally since March 9, 2000.
What’s driving the rally
AI memory chip shortages have been the primary accelerant. As hyperscalers, sovereign AI projects, and enterprise customers compete for limited supply, memory chipmakers have found themselves in the enviable position of selling everything they can produce at premium prices.
Every single stock in the SOX index has climbed at least 14% during this 25-day window. Typically in semiconductor rallies, you see a handful of names doing the heavy lifting while the rest tag along modestly. This time, the tide lifted everything from analog chipmakers to equipment suppliers.
The standout performers have been Intel, Credo Technology, and Astera Labs, each posting gains north of 100%. Intel’s resurgence is particularly notable. The company’s collaboration with Apple has injected fresh optimism into a stock that spent years as the sector’s cautionary tale. Credo Technology and Astera Labs, both focused on connectivity and infrastructure silicon for data centers, have ridden the AI buildout wave with the kind of momentum usually reserved for meme stocks.
Year-to-date, the SOX is now up 63%.
The bubble question nobody can avoid
Marko Kolanovic, a veteran macro strategist known for calling major market inflection points, has reportedly taken a cautious stance. Michael Burry, the investor who became a household name for shorting the housing market before the 2008 financial crisis, has been purchasing protective puts on the iShares Semiconductor ETF.
The bull case rests on fundamentals that are genuinely different from 2000. Back then, semiconductor revenues were tied to PC cycles and telecom buildouts that never materialized at the scale investors imagined. Today, AI spending is backed by actual corporate budgets, real revenue growth at hyperscalers, and government-level investment programs across the US, Europe, and Asia.
Memory chip shortages, while bullish in the short term, also tend to trigger capacity expansions that eventually create oversupply. It’s a movie the chip industry has screened roughly every four to five years for the past three decades.
What this means for investors watching the AI chip arms race
Investors are being advised to look at both Asian and US chipmakers, reflecting the reality that AI development is not a single-country story. Taiwan, South Korea, Japan, and the US each control critical nodes in the semiconductor supply chain.
The Intel-Apple collaboration is one specific catalyst worth monitoring going forward. If that partnership delivers competitive silicon, it could reshape the competitive landscape in ways that benefit Intel shareholders but create headwinds for other foundry and chip design companies.