China’s AI chip stocks have lost $480 billion in four months

China’s Star 50 index of AI and chip leaders has fallen about 40% in under four months, wiping roughly $480 billion off its market value, according to Reuters, as summarized by Techmeme. The wire service also reported that chipmaker CXMT is down about 25% in the past month.

Worries about AI demand and export curbs

Reuters said that while global tech stocks are wobbling, Chinese ones have already crashed as lofty valuations gave way. It put the cause down to concerns about AI demand and curbs on Chinese exports. The full Reuters article was not available to us, so details beyond that public summary, such as which other companies are hit hardest, are not covered here. We found no company or exchange statement that confirms the figures, so they stand as Reuters’ reporting.

A heavy loss for one of the sector’s biggest names

The CXMT figure shows the pressure reaching a single large chipmaker, not only the index. A fall of about a quarter in one month is steep for a company in the same index that Reuters describes as home to the country’s AI and chip leaders. The summary does not say what drove CXMT’s move specifically, so it should not be read as a result of any one cause.

What is still unclear

The Reuters summary does not say how much of the decline reflects weaker AI spending and how much reflects trade restrictions, nor whether the sell-off is spreading beyond the Star 50. It also gives no forecast, and none should be inferred from it.

The slide sits alongside strain elsewhere in AI markets. Our recent coverage showed Elon Musk predicting heavy losses among neocloud providers as CoreWeave and Nebius shares fell, and we explained how AI chips and customer contracts have become loan collateral. Together they point to investors questioning how much demand sits behind AI infrastructure spending, in the US and in China alike.

For readers following the global AI race, the main point is that Chinese chip valuations, which had climbed on hopes of domestic self-sufficiency, are now being repriced. Whether that is a pause or a longer correction is not something the available reporting answers.