Why today's hedge fund industry may not survive. By Columnist Martin Wolf. March 18 2008 18:09

Hardly a week goes by without the implosion of a hedge fund. Last week it was Carlyle Capital, with an astonishing $31 of debt for each dollar of equity. But we should not be surprised. These collapses are inherent in the hedge-fund model. It is even conceivable that this model will join securitised subprime mortgages on the scrap heap.

Now consider the financial sector as a whole: it is, again, hard either to distinguish skill from luck or to align the interests of management, staff, shareholders and the public. It is in the interests of insiders to game the system by exploiting the returns from higher probability events. This means that businesses will suddenly blow up when the low probability disaster occurs, as happened spectacularly at Northern Rock and Bear Stearns.

Moreover, if these unfavourable events – stock market crashes, mortgage failures, liquidity freezes – come in stampeding herds (because so many managers copy one another), they will say: "Nobody could have expected this, but, now that it has happened to all of us the government must come to the rescue."

The more one believes this is how an unregulated financial system operates, the more worried one has to become. Rescue from this crisis may be on the way, but what about next time and the time after next?