Last week I received an e-mail that made chilling reading. The author claimed to be a senior banker with strong feelings about a column I wrote last week, suggesting that the explosion in structured finance could be exacerbating the current exuberance of the credit markets, by creating additional leverage.

"Hi Gillian," the message went. "I have been working in the leveraged credit and distressed debt sector for 20 years . . . and I have never seen anything quite like what is currently going on. Market participants have lost all memory of what risk is and are behaving as if the so-called wall of liquidity will last indefinitely and that volatility is a thing of the past.