** Shares of CSL CSL.AX tanked as much as 16.6% to A$176.23, hitting their lowest level since December 24, 2018
** Stock set for weakest trading session since mid-August, if current trends hold
** Biotech giant no longer expects to complete the spinoff of its vaccine division in fiscal 2026
** Co cites heightened volatility in the U.S. influenza vaccine market
** Demerger is now expected to occur when market conditions support maximizing shareholder value — CSL
** Stock down 35.8% YTD, as of last close
(Reporting by Shivangi Lahiri in Bengaluru)
((shivangi.lahiri@thomsonreuters.com))