American stocks, which previously dominated global markets, have experienced a shift in 2025, marking an end to a multi-year winning streak. Following substantial gains of 26% in 2023 and 23% in 2024, US equities have underperformed shares in other developed markets, which saw increases of 14% and 2% respectively over the same period.

The reversal in performance occurs despite the United States being a central hub for the ongoing artificial intelligence (AI) boom. Data indicates a noticeable change in market dynamics this year, diverging from the strong upward trend observed in previous years. Detailed performance data can be found in chart 2 (referenced in the original source).

The exceptional performance of US stocks in 2023 and 2024 established them as a benchmark for global investment. The recent shift suggests a potential recalibration of market expectations and highlights the evolving landscape of international finance. The reasons behind this change are currently under analysis, but the data clearly demonstrates a departure from the previous period of significant outperformance for American markets.