Big tech stocks fell on Tuesday. Nvidia, Oracle, Broadcom down over 4%; Tesla, Micron, TSMC, Palantir down about 3%; Amazon, Meta down around 2%.

The United States and China on Tuesday began charging additional port fees on ocean shipping firms that move everything from holiday toys to crude oil, making the high seas a key front in the trade war between the world's two largest economies.

China said it had started to collect the special charges on U.S.-owned, operated, built, or flagged vessels but clarified that Chinese-built ships would be exempted from the levies.

In details published by state broadcaster CCTV, China spelled out specific provisions on exemptions, which also include empty ships entering Chinese shipyards for repair.

The China-imposed extra port fees would be collected at the first port of entry on a single voyage or for the first five voyages within a year, following an annual billing cycle beginning on April 17.

Early this year, U.S. President Donald Trump's administration announced plans to levy the fees on China-linked ships to loosen the country's grip on the global maritime industry and bolster U.S. shipbuilding.