Zai Lab Limited
NASDAQZai Lab heads into September with a curious split: short sellers are rebuilding positions at the fastest pace in months, yet options traders have abruptly abandoned the defensiveness that defined the past two months. The most striking move this week is in options. Zai Lab's put/call ratio has collapsed to 1.96 — nearly two standard deviations below its 20-day average of 3.74…
ZLAB cost to borrow surges 337% in one week to 2.79%, signaling tightening supply as shorts face rising borrowing costs.
Snapshot as of 20 Sept 2026
Zai Lab heads into September with a curious split: short sellers are rebuilding positions at the fastest pace in months, yet options traders have abruptly abandoned the defensiveness that defined the past two…
ZLAB has had a remarkable week, posting a 27.6% gain to $23.32 after first-in-human data for ZL-1310 in advanced small cell lung cancer delivered a positive surprise that caught short sellers badly positioned. The…
ZLAB reports today with a notably charged short-selling backdrop — short interest has climbed roughly 33% over the past month, borrow availability has tightened sharply, and the CEO has been selling stock in size…
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