If you are the CEO of a major global bank and you have to announce a $2.0 billion trading loss, you will no doubt feel that the shareholders, regulators, and reporters are all against you. But if you announce that the loss occurred in a portfolio that just six weeks earlier was the subject of criticism in the press, and which you described as nothing more than “a tempest in a teapot”, you are entitled to feel that the gods are against you.

The gods definitely have it in for Jaime Dimon, CEO of JP Morgan Chase, the legendary “fortress balance sheet” bank that prides itself on having avoided problems during the housing bust and credit crisis of 2007-2008. Someone inside the bank blew a large cannonball through the bank’s fortress walls, and it seems likely to have been “the Whale” of the credit derivatives market, JP Morgan’s Bruno Michel Iksil.