Investment banking is known as an industry where the solution to big problems involves an all-night shift or spending the entire weekend at the office. Not this time.

When asked what staff at his bank were doing over the weekend in response to the referendum result, a senior ECM banker at one large US firm said "nothing", while the global head of debt capital markets at another big bank said "calls were happening to share views" but his team was not expected to be in the office.