Not for nothing did US billionaire Warren Buffett call them the real 'weapons of mass destruction'

The market is worth more than $516 trillion, (£303 trillion), roughly 10 times the value of the entire world's output: it's been called the "ticking time-bomb".

It's a market in which the lead protagonists – typically aggressive, highly educated, and now wealthy young men – have flourished in the derivatives boom. But it's a market that is set to come to a crashing halt – the Great Unwind has begun.

Last week the beginning of the end started for many hedge funds with the combination of diving market values and worried investors pulling out their cash for safer climes.

Some of the world's biggest hedge funds – SAC Capital, Lone Pine and Tiger Global – all …