加拿大276亿美元对美报复性关税正式生效
Canada's retaliatory tariffs worth $27.6 billion take effect as trade rift with U.S. deepens
推荐理由
关税已落地生效，直接改变跨境商品交易成本与合规要求。建议关注受影响板块及汇率波动，留意后续政策动向。
Duties on U.S. steel and aluminum products have doubled to 50% as a war of words between Washington and Ottawa continues.
更进一步：量化金融体系
看懂新闻只是起点——沿量化金融路径，把它变成能交付的工程能力