** Gene editing firm Intellia Therapeutics' shares fall 18% to $16.38
** Company says its experimental gene therapy to treat a rare disorder called hereditary angioedema $(HAE)$ helped reduce monthly swelling attacks by up to 81% vs placebo in a mid-stage study
** HAE is characterized by unpredictable and frequent severe swelling of the skin, gastrointestinal tract, upper respiratory system, face and throat
** "We expect investors will view the ~75-80% reduction in HAE attacks as less than impressive in the context of the potential risks of in vivo gene editing and the competitive landscape in this indication" - brokerage Baird
** HAE treatments in the U.S. that are currently approved include drugs made by Takeda Pharmaceuticals and BioCryst Pharmaceuticals
** Including session moves, Intellia shares down ~46% YTD
(Reporting by Mariam Sunny in Bengaluru)
((Mariam.ESunny@thomsonreuters.com))
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