** Shares of drug developer Wave Life Sciences WVE.O fall 56.2% to $5.39 premarket
** Co says its experimental obesity drug showed a less than 1% reduction in average body weight compared to placebo in an early-stage trial
** Co says a 240 milligram dose of the drug called WVE-007 showed a placebo-adjusted reduction in body weight of 0.9% after 6 months
** Co says the drug was safe and well tolerated, says it is on track to start a mid-stage study testing WVE-007 as a monotherapy in individuals with higher BMI and comorbidities in Q2
** Up to last close, stock down 27.7% YTD
(Reporting by Sneha S K)
((Sneha.SK@thomsonreuters.com;))