Chinese curbs on exports of three niche metals to the US have already rattled the market. Now, a bigger clampdown looks set to have far-reaching ramifications for supply chains feeding American defense and chip-making industries.
Beijing this month slapped a ban on US-bound exports of gallium, germanium and antimony in a tit-for-tat move in a technology trade war. The metals are important because they have crucial uses in many Western industries from military tech to semiconductors to satellites.