ZAI LAB (09688) saw its stock soar by 5.50% during intraday trading on Thursday, as part of a broader rally in the pharmaceutical sector on the Hong Kong stock exchange. The significant uptick in ZAI LAB's share price aligns with the overall positive sentiment observed across various pharma stocks.

The pharmaceutical sector experienced a notable surge, with multiple companies recording substantial gains. While specific catalysts for the sector-wide rally were not immediately clear, investors appeared to show renewed interest in pharma stocks, possibly due to favorable market conditions or positive industry developments.

Among the top performers, Sino Biopharm led the pack with an impressive 13% increase. Other notable gainers included Immunotech, which matched ZAI LAB's 5% rise, while Dualitybio and Grand Pharma both advanced by 4%. Additionally, Ascletis, Remegen, and Beigene each saw their shares climb by 3%, further underscoring the broad-based nature of the pharma sector's rally.