U.S Stock opened lower on Thursday as investors shied away from risk-taking after another bout of tariff threats from U.S. President Donald Trump, while geopolitical worries and a cautious Federal Reserve further dented sentiment.

U.S.-listed shares of Alibaba jumped 10% in morning trading. The Chinese e-commerce giant topped Wall Street expectations for third-quarter revenue, on strong year-end shopping sales and the success of its strategy to attract cost-conscious consumers.