On Friday August 3 last year, as US financial markets were approaching the summer doldrums and bankers began to head off for holidays on Long Island or Cape Cod, Bear Stearns held a conference call for investors.

Shares in the investment bank, the fifth largest in the world, had fallen as investors worried about the collapse of two hedge funds that it managed and its exposure to the troubled housing market. But few were prepared for the candour of Sam Molinaro, its chief financial officer. Instead of reassuring them about Bear Stearns’ financial condition, he scared them even more: “I’ve been at this for 22 years. It’s about as bad as I have seen it in the fixed income market during that period . . . [what] we have been seeing over the last eight weeks has been pretty extreme.”