Sunk by correlation


Equity derivatives businesses have seen their revenues riven by losses during the first half of 2008. The malaise in credit, brought on by excessive US subprime mortgage losses, took hold of major equity markets earlier in the year. Subsequent spikes in volatility and correlation, combined with a drop in dividend expectations, have conspired to cause mark-to-market carnage for dealers' exotic books, which some estimate runs into billions of dollars. "Everybody's looking at their exotic books.