Or whatever they have in mind, which we do not know: a new deeper step in the euro-crisis, a major devaluation of the US dollar, an upcoming war in Iran or China? Or just noise? Or just concentration of power: who's buying?
Whatever the case, they are indeed selling and a lot.
One of the most notorious sellers is Eric Schmidt, who sold most of his stock of Google, after a more moderate sale in 2012.
On light of this, Wolf Richter wonders at Naked Capitalism: what do they know that we do not?