Global investors face a deepening diversification problem as portfolios remain heavily tilted toward a narrow group of US technology stocks. Europe, last year's favored diversifier, lacks the AI-driven earnings growth and fiscal firepower of the US while remaining a net energy importer. Emerging Asia offers little shelter either; Taiwan and South Korea now comprise roughly half the MSCI Emerging Markets index and are tightly bound to the same semiconductor capex cycle investors want to hedge.

That leaves China, where the investment case rests on three structural differences. First, energy autonomy: clean energy investment exceeded $625bn in 2024, hitting 2030 wind and solar targets six years early. Second, a highly internalized supply chain accelerated by US export controls, giving China domestic AI models, local fabrication, and control over rare earths. Third, correlation breakdown: the two-year rolling correlation between MSCI China and the S&P 500 has fallen to 14 per cent from 70 per cent in 2018-19, with similarly low linkages to Japan (3 per cent) and Europe (29 per cent).

Risks remain — policy opacity, property weakness, demographics, and geopolitical tensions — but diversification requires different risks, not zero risk. With US and EU investment restrictions on Chinese tech expanding, the irony sharpens: the most effective hedge against American exceptionalism may be the market Washington has tried hardest to isolate.