In the second of his two lectures in honor of Arthur Okun, Professor Summers points out that real interest rates have been very low in the current subprime crisis. This indicates that the shock to the economy was more a financial breakdown shock than a disinflation shock. But financial breakdown shocks are not necessarily very harmful to the economy, so long as financial intermediation capital is not destroyed. In a financial crisis like the present one, financial firms are likely to take the step of decreasing their leverage, often by contracting loans, which creates its own risks for the economy. Regulators should place pressure on financial institutions to raise their capital and should intervene in near foreclosure situations, but should not attempt to support housing prices.