U.S. stocks approach historic dot-com bubble valuations as Fed Chief Warsh takes office

 

NEW YORK/HONG KONG — Wall Street closed higher this week, with the S&P 500 up 0.88% and the Nasdaq 100 gaining 1.22%, fueled by stellar first-quarter earnings from semiconductor giant Nvidia. However, beneath the tech-driven momentum, underlying macroeconomic pressures and a pivotal leadership transition at the Federal Reserve suggest a period of market fluctuation and potential correction could be imminent.

Kevin Warsh was officially sworn in as the 17th Chairman of the Federal Reserve on May 22, 2026. Given Warsh’s historically hawkish stance on quantitative tightening, analysts anticipate the central bank may accelerate balance sheet reductions and pause further interest rate cuts. This policy outlook is compounded by the Federal Reserve's April meeting minutes, which revealed that policymakers remain open to raising interest rates if geopolitical frictions, such as ongoing conflicts with Iran, continue to stoke inflation. April economic data showed the U.S. Consumer Price Index (CPI) rising 3.8% year-on-year—a three-year high—while the Producer Price Index (PPI) surged 6% and energy prices jumped 17.9%. This persistent inflation has caused American wage growth to lag behind living costs for the first time since 2023, raising intense market anxieties regarding potential economic stagflation.

Valuation metrics indicate that the broader U.S. equity market is trading at overbought extremes that mirror the peak of the 2000 dot-com bubble. As of late May 2026, the S&P 500's price-to-book (PB) ratio stands at 5.76, and its price-to-sales (PS) ratio has reached 3.81—both placing at the absolute 100th percentile over a 10-year period. In comparison, during the 2000 tech bubble peak, the PB and PS ratios hovered at 4.98 and 2.2, respectively. Historical precedents show that whenever the S&P 500 breaks major psychological barriers—such as the 6,000-point mark broken at the end of 2025 before correcting due to Middle East tensions—it is frequently followed by a 5% to 8% pullback.

Consequently, portfolio strategists are advising against chasing overextended semiconductor and AI stocks due to fear of missing out (FOMO). Instead, institutional recommendations favor rotating capital into defensive value sectors with reasonable margins of safety. Key targets include the U.S. medical device sector, which is trading at a historically low projected price-to-earnings (P/E) ratio of 17.60, as well as grid infrastructure and nuclear-backed energy giants like Eaton Corporation (ETN) and Vistra Corp (VST) that stand to benefit from AI-driven utility demand. On a global allocation front, analysts recommend balanced 40% defensive positions in both U.S. equities and Chinese A-shares, noting that while the CSI 300 Index has technically returned to a short-term bull trajectory by breaking its 120-day exponential moving average (EMA), low domestic profit margins still warrant caution against localized shocks.