US-China decoupling: halving investment in China could cost American GDP up to US$500 billion, report says

• US Chamber of Commerce report says US GDP would see a one-time loss of as much as US$500 billion should companies reduce foreign direct investment in China by half
• Applying a 25 per cent tariff on all two-way trade would trim US GDP by US$190 billion annually by 2025, it said in the joint study with the Rhodium Group