To be fair to Stobart, most shares are having a torrid time at the moment.
e.g. BP have lost £1 from their recent peak.
What I'm wondering is how much the company value is affected by the fact that a large chunk of their investment has gone into something they don't own - i.e the airport itself. They may have the benefit of their investment for several years but a lot of money has gone into improving somebody else's property.