Global stock market valuations have surged to levels that prompt questions about whether equities are overvalued. According to UBS strategists, while valuation metrics are elevated in November 2025, especially in the U.S. technology sector, this does not necessarily forecast an imminent market correction. Instead, robust earnings forecasts and liquidity continue to support these inflated valuation levels, indicating a complex investment landscape.

Valuation Elevated and Concentrated in Technology

The MSCI All Country World Index now trades above a forward price-to-earnings ratio of 19, approximately 30% higher than its 20-year historical average. This upward shift is primarily attributable to fast-growing, highly valued sectors like information technology, which represent over 28% of the global benchmark—a substantial increase from just 11% ten years ago. In the United States, this concentration is especially pronounced. The S&P 500 commands a forward P/E multiple of 23, nearing its highest records, while the NASDAQ Composite holds a trailing P/E around 30, well below dot-com bubble peaks, but still reflecting strong investor optimism.

In contrast, other key regions display more tempered valuations. European equities trade roughly 10% above their long-term average, Chinese stocks are near 7% higher, and Japanese markets continue to trade at a discount. These variations highlight the disproportionate influence of U.S. tech stocks on global valuation figures.

Analyst Scenarios: Earnings Growth and AI’s Role

UBS projects that S&P 500 earnings per share will climb 11% in 2025 and rise a further 10% in 2026. This earnings momentum underpins market strength and helps justify the current elevated valuations. Moreover, ongoing liquidity conditions remain favorable, sustaining investor risk appetite.

Looking further ahead, UBS underscores artificial intelligence as a pivotal factor. If AI delivers anticipated productivity improvements, equity markets may “grow into” their lofty valuations, easing pressures on multiples. Conversely, underwhelming AI progress could intensify valuation concerns and pose a significant downside risk.

UBS notes that despite elevated valuation levels, the market is not inherently fragile. Historical precedents, such as warnings of “irrational exuberance” in the mid-1990s and concerns about a “QE bubble” in 2013, were followed by sustained market advances. Thus, stretched multiples tend to signal lower expected long-term returns rather than an immediate downturn.

Valuation: Market Outlook

Currently, the MSCI All Country Index trades roughly 30% above its 20-year average at forward multiples above 19. The U.S. continues to be the standout with the S&P 500 at 23 times forward earnings and the NASDAQ Composite near a 30 trailing P/E. UBS’s forecast of double-digit earnings growth in 2025 and 2026, combined with plentiful liquidity, supports this elevated valuation landscape. However, artificial intelligence stands as a major swing factor that can either validate or challenge current multiples. For investors, valuation remains a vital metric amid a market environment where strong earnings and innovation are crucial to sustaining elevated prices.