China Stock of the Day | Kabutaro & Friends

CanSino Biologics <688185>, a vaccine maker based in Tianjin, was the Chinese stock most talked about online on September 30, 2026.
Background: On September 30, the stock hit its 20% daily limit at 102.64 yuan within nine minutes of the open and stayed locked there, with buy orders at the limit price exceeding 800 million yuan at one point. It was the last trading day before the National Day holiday, and pharmaceutical stocks rose across the board. The pharmaceutical index gained 2.73% and the innovative drug index 3.42%, while net inflows of main funds into the pharmaceutical and biotech sector exceeded 12.7 billion yuan, the most of any industry. Four catalysts were cited in the market: the national 15th Five-Year Plan's call to dynamically optimize the immunization program; AstraZeneca's announcement of a $2 billion investment in Summit Therapeutics of the U.S.; the expansion of mRNA technology from infectious disease prevention to cancer treatment; and brisk out-licensing deals by Chinese innovative drug companies.