In 326 years of recorded financial markets, only two assets have ever stretched as far above their long-term trend as the semiconductor index is stretched today. The French Mississippi Company in 1720. The Nasdaq in March 2000. The third is happening this week. NVIDIA reports earnings tomorrow.

Bank of America Chief Investment Strategist Michael Hartnett wrote in his Friday “Flow Show” note that the Philadelphia Semiconductor Index is trading 62% above its 200-day moving average. He searched the record back to 1700 for comparable readings. He found two. The French CAC All Tradable Index reached 73% above trend at the Mississippi Bubble peak in 1720. The Nasdaq Composite reached 55% at the dot-com peak in March 2000. The SOX sits between them, closer to 1720.

The Mississippi Bubble is the first true stock mania in modern financial history. A Scottish financier named John Law convinced the French regent in 1716 to let him establish a national bank issuing paper money, then bundle it with the Compagnie des Indes, holding exclusive rights to French colonies along the Mississippi River. Shares opened at 500 livres in January 1719. By December they traded at 10,000, a 1,900% gain in under 12 months. The French money supply doubled because Mississippi Company shares were granted legal tender status. When holders tried to convert paper gains into gold in early 1720, the redemption system failed. Shares fell to 1,000 livres by December. The currency went worthless. France entered deep recession. Law fled the country. The Nasdaq drew down 78% in the two and a half years after March 2000.

The current setup carries every symptom Hartnett documents in extreme manias: exponential price action, extreme market concentration, collapsing volatility, and stocks pulling bond yields higher rather than the reverse. AI-related stocks now represent roughly 45% of S&P 500 market capitalization per Goldman concentration data, with semiconductors as the dominant driver. Hedge fund net exposure to chips has hit 19% of global equity allocation, a record and double where it started 2026. The SOXX ETF weekly RSI hit 85.5 on May 8, the highest overbought reading since the dot-com peak. Intel is up 430% over the past year at 114 times forward earnings. Michael Burry has disclosed put options on SOXX, QQQ, Palantir, NVIDIA, and Oracle expiring January 2027.

NVIDIA reports fiscal Q1 2027 earnings after the close on May 20. Consensus expects $79 billion in revenue and $1.78 in EPS against $0.81 a year ago. Forward Q2 guidance is the number that will move the index. Analysts have penciled in $87 billion. The stock is priced for that to be a floor.

The trigger for these regime changes is historically small. In 1720 it was investors trying to redeem paper for gold. In 2000 it was a headline about Japan slipping into recession. The structure was loaded in advance. The match arrived last. Whether the AI cycle eventually produces real productivity is a different question from whether the assets financing it have run ahead of the math. The technology can be transformative and the price unsustainable at the same time. The two have coexisted at every market top in history. This cycle adds physical power and geopolitical chokepoints the prior two never faced.

Hartnett is not saying the technology is fake. He is observing the price doing something only two prior assets have ever done. Neither ended well.