** Shares of drug developer Annovis Bio ANVS.N rise 16.8% to $6.25 premarket
** Co says U.S. FDA has accepted co's updated late-stage Alzheimer's disease study protocol
** Updated protocol combines originally proposed 6-month symptomatic study and 18-month disease-modifying study into a single trial - co
** 5 of 6 brokerages rate the stock "buy" or higher and 1 "hold"; their median PT is $26 - LSEG
** Stock declined ~73% in 2024
(Reporting by Kamal Choudhury in Bengaluru)
((Kamal.Choudhury@thomsonreuters.com;))