WuXi AppTec Becomes Top Short Target as 80% Rally Draws Skeptics

Markets Contact us:Provide news feedback or report an error Confidential tip?Send a tip to our reporters Site feedback:Take our Survey By Bloomberg News August 21, 2026 at 5:07 AM UTC Chinese biotech firm WuXi AppTec Co. has been one of the market’s hottest stocks this year, but its rally is starting to attract a growing group of skeptics. Short positions relative to free float have risen the most among Hang Seng Index stocks over the past four weeks, according to data provider S3 Partners. Bearish wagers climbed to 23.4% of free float as of Thursday, approaching levels last seen in August 2025, when the figure reached about 28%.