The latest wave of credit market innovations has elicited some concerns about their implications for the stability of the financial system, concerns similar to those associated with earlier periods of rapid change in financial markets. Will the most recent credit market innovations amplify credit cycles, contributing to "excessive" lending in times of relative stability, and then magnify the contraction in credit that follows? Will they introduce greater volatility in financial markets? Will they create greater risk of systemic financial crisis?

These concerns have been heightened in some quarters by the problems currently being experienced in the subprime mortgage sector. It will take some time before the full implications are understood and the full impact can be assessed. As of now, though, there are few signs that the disruptions in this one sector of the credit markets will have a lasting impact on credit markets as a whole.

Indeed, economic theory and recent practical experience offer some reassurance against both these specific concerns and more general worries about the implications of credit market innovations for the performance of the financial system.

And how about?

Credit market innovation does not appear to have resulted in a large increase in leverage in the corporate sector, as some had feared. Indeed, nonfinancial corporate leverage in the United States is currently low by recent historical standards. The overall degree of balance sheet leverage by corporations, for example, is higher in some more traditional financial systems than it is in systems where credit market innovations are more advanced.

With that said, he did see the need for more oversight.

What should policymakers do to mitigate these risks?

We cannot turn back the clock on innovation or reverse the increase in complexity around risk management. We do not have the capacity to monitor or control concentrations of leverage or risk outside the banking system. We cannot identify the likely sources of future stress to the system, and act preemptively to diffuse them.

The most productive focus of policy attention has to be on improving the shock absorbers in the core of the financial system, in terms of capital and liquidity relative to risk and the robustness of the infrastructure.

These issues are the principal focus of day-to-day supervision and market oversight in the major financial centers around the world. The Federal Reserve is actively involved in a range of efforts, working closely with the primary supervisors of the major global financial institutions and the critical parts of the financial infrastructure, to encourage further progress. In this context, we are working to put in place a stronger regulatory capital regime and to strengthen the capacity of firms to absorb losses in stress conditions. We are encouraging more sophisticated and more conservative management of credit exposures in over-the-counter derivatives and structured financial products, as well as of exposures to hedge funds. And we are encouraging a range of efforts to modernize the operational infrastructure that underpins the over-the-counter derivatives markets, and to improve the capacity of market participants to manage a major default.

Of course, "a stronger regulatory capital regime" never materialized.