<i>Goldman's market value</i> declined by $2.2bn in one day.<p>To a first approximation, this tells us <i>nothing</i> about how much it has cost Goldman Sachs. Are customers walking away, whether to competitors or out of the market entirely? Who knows?
Taking Lawrence Lessig's view: <a href="http://edition.cnn.com/2012/03/15/opinion/lessig-goldman-sachs/index.html" rel="nofollow">http://edition.cnn.com/2012/03/15/opinion/lessig-goldman-sac...</a> , this is the problem