China’s AI stock rally has hit a wall. The CSI Artificial Intelligence Index dropped sharply on June 26, pulling broader Chinese equity markets down with it, as investors took stock of stretched valuations and intensifying competition in the global AI race.

What actually happened

The CSI Artificial Intelligence Index, which tracks AI-related stocks listed in China, declined 4.6% on June 26. That is a significant single-day move for an index that had been on a historic run, gaining approximately 120% over the preceding year.

The CSI 300, China’s benchmark for large-cap equities, fell 3% on the same day. The Shanghai Composite lost 2.3%. Hong Kong markets joined the retreat, with notable selloffs in AI and chip-related names listed there as well.

The ChinaAMC CSI Artificial Intelligence ETF, one of the primary vehicles retail and institutional investors use to gain exposure to this theme, would have tracked closely with the index decline.