** Shares in prosthetics maker Ottobock OBCK.DE fall 11% after a report from short seller Grizzly Research accused the owner of having high debt and the company of applying aggressive accounting metrics
** Grizzly disclosed a short position in the firm
** Ottobock did not reply to a Reuters request for comment
** Shares in the company, which were listed in Germany in October last year and are part of the small-cap index .SDAXI, are on track for their worst trading day ever if the losses hold
(Reporting by Paolo Laudani in Gdansk)
((Paolo.laudani@thomsonreuters.com))