Wall Street warns of borderline mania as AI semiconductor rally mirrors bubble euphoria

May 17, 2026, 11:10:07 AM UTC(17 hours ago)

Impact: Medium

Affected Assets

The Philadelphia Semiconductor Index has surged approximately 70 percent since March 2026 lows as investor frenzy intensifies
Nvidia valuation reached a historic 5.5 trillion dollars while competitor Cerebras saw a 68 percent jump in its 2026 market debut
Yardeni Research raised its year end S&P 500 target to 8250 citing unprecedented growth in consensus earnings expectations
Evercore ISI analysts noted that current market sentiment feels like 1999 despite stock valuations remaining below dot com era peaks
Federal Reserve officials have distinguished this rally from past bubbles by pointing to actual enterprise revenue generated by AI data centers

'This is borderline mania': Wall Street sees bubble-like euphoria in AI-fueled semiconductor rally https://t.co/SLJbW7rQue