Weekend - China warns of countermeasures as US Treasury widens tech investment curbs to biotech

China has warned it will take countermeasures after the US Treasury expanded its outbound investment restrictions, which previously targeted semiconductors, quantum computing and AI, to now cover biotechnology. The headline itself does not specify the scope of the expanded curbs or the exact form of Beijing's response. The transmission channel runs through cross-border capital flows and risk appetite: restrictions on US investment into Chinese biotech firms can reduce capital access for those companies, raise the perceived political risk premium on China-linked equities, and prompt retaliatory measures that could affect dollar-yuan dynamics and US-China trade flows. Chinese equities, particularly biotech and healthcare names, and US-listed China-exposed stocks appear most directly exposed, while the USD and Treasury-related assets are more indirectly affected through safe-haven demand and policy-driven repricing. Traders will watch Beijing's formal retaliatory announcements, including any export controls or restrictions on US firms, in the first trading session after the weekend.

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