** Shares of drug developer Kodiak Sciences KOD.O fall
~51% to $3.6 premarket
** Stock top pct loser across U.S. stock exchanges premarket
** KOD says will stop further development of its
experimental eye disease drug, tarcocimab tedromer
** Co says drug failed to meet main goal in two late-stage
studies testing it as a treatment for diabetes macular edema, a
leading cause of blindness in patients with diabetes
** KOD says drug failed to match Regeneron Pharmaceuticals'
REGN.O Eylea in improving the vision of patients
** Co says an unexpected increase in cataracts was also
observed over time in those receiving KOD's experimental drug
in both late-stage studies
** As of last close, KOD up 1.82% this year
(Reporting by Bhanvi Satija and Pratik Jain in Bengaluru)
((Bhanvi.Satija@thomsonreuters.com; Outside U.S. +91
9873062788;))