Pre-market: 0503.HK Lansen Pharma up 40.94% (HKSE) 09 Jan 2026: volume focus

The headline fact: 0503.HK stock jumped to HKD 1.79, a 40.94% gain pre-market on 09 Jan 2026, driven by a 13,959,137 share print versus an average of 476,561. Volume is the defining driver and signals active repositioning ahead of the Hong Kong session open. We analyse trading metrics, valuation, and what this flood of orders means for short-term traders and longer-term holders.