SKN | Goldman Sachs Warns AI-Fueled Stock Rally Is Showing Signs of Exuberance

Key Takeaways:

• Goldman Sachs says U.S. stocks are showing increasing signs of exuberance following the AI-driven rally, though conditions remain below previous bubble extremes.
• The bank’s market indicators are now at the 86th percentile historically, reflecting elevated optimism, momentum trading, and narrowing market breadth.
• Despite growing caution, Goldman believes strong corporate earnings and continued profit growth support the broader market outlook.

Goldman Sachs Sees Growing Signs of Market Exuberance

Goldman Sachs has issued a warning that enthusiasm surrounding artificial intelligence and momentum-driven investing is pushing U.S. equities into increasingly stretched territory, although the bank stops short of calling the current environment a full-scale market bubble.

The investment bank noted that the S&P 500 has gained approximately 13% since late March, with much of the advance fueled by investor optimism surrounding AI technologies, semiconductor companies, and next-generation computing infrastructure.

According to Goldman Sachs, its basket of nine indicators measuring market behavior, investor sentiment, and positioning has climbed to the 86th percentile relative to historical readings dating back to 1995. While elevated, the figure remains below levels reached during the dot-com boom and the speculative surge seen in 2021.

AI Enthusiasm Continues to Drive Markets

The AI investment theme remains one of the dominant forces supporting equity markets.

Goldman noted that investors continue to reward companies perceived as beneficiaries of artificial intelligence adoption, helping drive significant gains across technology and semiconductor sectors.

However, the bank observed that market leadership has become increasingly concentrated. Narrowing market breadth and aggressive buying of high-valuation growth stocks have become more apparent as investors focus capital on a relatively small group of AI-related companies.

While this concentration can amplify gains during bull markets, it can also increase volatility if sentiment shifts or earnings fail to meet elevated expectations.

Earnings Growth Supports Valuations

Unlike previous speculative episodes, Goldman argues that current market strength is being supported by improving corporate fundamentals.

Consensus forecasts for S&P 500 earnings have risen approximately 16% this year, significantly outpacing the index’s 8% gain over the same period. Goldman projects S&P 500 earnings will reach roughly $340 per share in 2026, representing growth of approximately 24% from 2025 levels.

The bank believes this earnings expansion provides an important foundation for the current rally and helps distinguish today’s market environment from purely speculative periods where valuations surged without corresponding profit growth.

Investor Sentiment Remains Surprisingly Balanced

Despite the market’s strong performance, Goldman highlighted several indicators suggesting investor sentiment has not yet reached euphoric extremes.

Short interest remains elevated, indicating that many investors continue to maintain bearish positions. Additionally, recent surveys show that bearish respondents still slightly outnumber bullish investors.

Goldman’s proprietary U.S. equity sentiment gauge also remains relatively subdued compared to levels typically associated with major market tops.

Chief U.S. Equity Strategist David Kostin and his team noted that investor skepticism surrounding several high-profile opportunities, including the highly anticipated SpaceX IPO, suggests markets have not yet entered the kind of unchecked speculation often seen near bubble peaks.

Recent Volatility Highlights Market Sensitivity

The warning comes amid a volatile start to June for global equity markets.

Investor sentiment was shaken after stronger-than-expected U.S. employment data showed 172,000 jobs were added in May, significantly exceeding Wall Street expectations. The report reduced expectations for near-term Federal Reserve rate cuts and revived concerns that policymakers may keep interest rates higher for longer.

Additional pressure emerged from the technology sector after Broadcom delivered guidance that disappointed some investors hoping for even stronger AI-related growth forecasts. The reaction triggered profit-taking across several semiconductor stocks that had previously led the market higher.

The selloff briefly erased more than $1 trillion in semiconductor market value and contributed to weakness across global equity markets.

Outlook

Goldman Sachs believes markets are entering a period of adjustment as investors balance strong earnings growth against elevated valuations and interest-rate uncertainty.

While the bank acknowledges growing signs of exuberance, it does not believe conditions currently resemble the speculative extremes witnessed during previous market bubbles. Instead, Goldman sees a market supported by solid corporate profitability, ongoing AI investment, and generally balanced investor sentiment.

For investors, the message is one of caution rather than alarm. Elevated valuations and concentrated leadership may increase short-term volatility, but strong earnings growth continues to provide an important underpinning for the broader market.

Confidential Advisory: This publication is intended solely for informational purposes and should not be construed as investment, legal, tax, or financial advice. Past performance does not guarantee future results, and all investments involve risk.