Z.AI (02513) tumbled 6.56% during Tuesday's trading session, as investor sentiment soured following the announcement of a massive stock offering valued at approximately HKD 31.41 billion.

The sharp decline was primarily driven by dilution fears, as such a sizable equity issuance typically dilutes existing shareholders' stakes and places short-term pressure on the share price. While the proceeds are expected to fund business expansion and technology research and development, the immediate dilution effect has weighed heavily on market sentiment.

Compounding the selling pressure, the pullback also reflects a wave of profit-taking following the stock's rapid appreciation in recent sessions. Z.AI had surged over 30% on July 21 after disclosing its 1GW domestic AI computing center and the acquisition of Zhongke Jiahe, and gained another 10% on July 24 after JPMorgan maintained its Overweight rating. The swift prior gains amplified the selling momentum once the offering was announced.