** 3i III.L down over 18% after core asset Action misses investor expectations on margins and growth visibility
** Citi, which has buy rating, sees broadly solid trading offset by disappointing EBITDA margin and white space guidance
** Higher energy and transport costs may explain the margin miss, Citi adds, along with below trend LFL sales growth
** Sell-off amplified by positioning, with a broker saying “people are selling because other people are selling”
** The broker adds U.S. expansion adds uncertainty rather than support, with limited financial detail and acknowledgment that costs will be higher than in European rollouts
** 3i top FTSE .FTSE faller by 1536 GMT; shares down 31% YTD
(Reporting by Danilo Masoni; Editing by Amanda Cooper)
((Danilo.Masoni@tr.com; Reuters Messaging: danilo.masoni.thomsonreuters.com@reuters.net/))