** Shares of CSL CSL.AX fall as much as 15.3% to A$101.51, their lowest since mid-January 2017
** Stock logs largest intraday pct loss since late October 2025
** Biotech major trims fiscal 2026 earnings and revenue outlook
** Attributes downgrade to delays in payoff from growth initiatives and revenue headwinds from U.S. immunoglobulin inventory normalisation
** Flags $5 billion of non-cash impairments over FY26-27
** Citi says revenue and NPATA growth guides have now turned negative
** Brokerage says at this point, investor trust is likely to decline further
** Stock down over 40% YTD, including day's moves
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))