Little-known China startup allegedly spent $5.5 million, and used sub-optimal Nvidia chips, on an AI model that rates with the best created by US tech giants; this caused Nvidia and other tech shares to sink

WTO director-general Ngozi Okonjo-Iweala warned that tariffs of 25% or 60% could trigger tit-for-tat reprisals that return the world to the economic crisis of the 1930s

Tech giant, which owns TikTok, but may soon be permitted its sell its US arm, will spend half of that amount abroad on AI-related infrastructure, such as data centres and networking equipment, sources say

Trump noted on his first day in office the de minimis law, which allows over a billion products to be mailed to the US every year, is unlikely to survive for long

Trump announced the deal with OpenAI's Sam Altman, SoftBank CEO Masayoshi Son and Oracle founder Larry Ellison, saying it is the "largest AI infrastructure project in history"

Trump has ordered US agencies to review US trade deficits, unfair trade practices and currency manipulation; fentanyl is also a hot topic.

Before we head into Donald Trump’s first full day in office on Tuesday, here’s a look at what his first day back as president meant for technology, climate and markets

JPMorgan set up a “war room” to assess the impact of Trump’s policies on global trade, regulation and other matters, an executive told a panel at the World Economic Forum in Davos

The wide divergence of views of people in his inner circle is perhaps one reason why Trump held off imposing tariffs on China on day one of his presidency

Trump’s vow of support had prompted TikTok to restore its services in the US, after it stopped working for its American users late on Saturday

Beijing and Washington are painting a picture of bonhomie between the world's superpowers ahead of Trump's inauguration, but Chinese businesses remain cautious of a potential trade war

TikTok is receiving surprising support from unlikely quarters, but it remains unclear whether the app will remain online in the United States come Sunday