AI Stock Rally Echoes Dot-Com Bubble, But Valuations Diverge
Morningstar analysts highlight parallels between the current AI stock rally and the 1999 dot-com bubble, noting that despite significant growth, some AI stocks like Nvidia are still considered undervalued, while others are overvalued. The rally is significantly driven by hardware for AI and data centers. The article also touches on concerns in the bond market due to inflation worries and increased US Treasury issuance.
Key Takeaways
- Since late 2024 to May 2026, 63 US stocks covered by Morningstar analysts saw over 100% returns, with half tied to AI infrastructure.
- Eighteen stocks achieved over 200% returns, and eight exceeded 300% returns, with nine of the top 10 being AI stocks.
- Morningstar's price/fair value metric indicates the broad market is at a slight discount, while the technology sector's rally is justified by increased long-term growth visibility.
- Nvidia, a key AI buildout component, remains undervalued per Morningstar analysts, even after substantial stock price increases.
- Commodity-oriented technology hardware companies like Sandisk and Micron are considered overvalued based on their intrinsic valuations.
Why It Matters
The dynamic in AI stock valuations suggests a nuanced market, distinguishing between structural growth drivers and speculative bubbles. This impacts capital allocation for streaming infrastructure, where AI integration is becoming critical, influencing both the cost and availability of essential hardware. Companies should monitor Morningstar's fair value assessments to identify strategic investment opportunities versus speculative risks in the rapidly evolving AI hardware landscape.
Additional Context
The AI stock rally experienced a "healthy pause" in early June 2026, with the S&P 500 snapping a nine-week win streak and the Nasdaq declining from an all-time high, per Yahoo Finance (June 2026). This shift saw investors rotate out of semiconductors into more defensive plays. The slowdown was partly attributed to Broadcom's underwhelming Q3 AI chip guidance, sparking a broader semiconductor sell-off and raising questions about sustained high expectations (Yahoo Finance, June 2026). Separately, the Nasdaq 100 plunged 5% as AI stocks were impacted by rising bond yields following a strong jobs report, increasing expectations for a Federal Reserve interest rate hike (FX Leaders, June 2026). This market reaction indicates a tension between inflationary growth and potential stagflation. The PHLX Semiconductor Index saw its largest one-day decline since March 2020, with US-listed chipmakers losing approximately $1.3 trillion in market capitalization (TS2.tech, June 2026). Companies like Nvidia, Micron, and AMD were significantly affected, with Micron's shares dropping 13.3% and losing $150 billion in value (TS2.tech, June 2026). Despite recent volatility, the long-term outlook for AI remains strong. Capital Group (June 2026) highlights earnings growth as a primary market driver, with a multiyear AI investment cycle fueling growth across sectors. Hyperscalers like Amazon, Alphabet, Meta, Microsoft, and Oracle are committing $650 billion this year to data centers, indicating sustained investment in AI infrastructure (Capital Group, June 2026).
Read full article at global.morningstar.com