The world’s financial sector may be excessively sensitive to increasing uncertainty associated with major changes—that is, changes that impact how large institutions, including governments, relate to each other. In such cases, so much is at stake that forces (i.e., the major powers) tend to manage the large-scale change with a minimum of disturbance. In short, the status quo has too much at stake for the market’s feared uncertainty to actualize. The British referendum on whether the E.U. state should secede is a case in point.
The full essay is at "Global Markets and London."