Must-Read: The extremely sharp Michael Woodford makes the obvious point about quantitative easing and financial stability: by increasing the supply and thus reducing the premium on safe liquid assets, it should--if demand and supply curves slope the normal way--not increase but reduce the risks of the banking sector.
It is very, very nice indeed to see Mike doing the work to demonstrate that I was not stupid when I made this argument in partial equilibrium:
J. Bradford DeLong (January 17, 2014): "Beer Goggles", Forward Guidance, Quantitative Easing, and the Risks from Expansionary Monetary Policy: When the Federal Reserve undertakes quantitative easing, it enters the market and takes some risk off the table, buying up some of the risky assets issued by the U.S. government and its tame mortgage GSEs and selling safe assets in exchange. The demand curve for risk-bearing capacity seen by the private market thus shifts inward, to the left: a bunch of risky Treasuries and GSEs are no longer out there, as the government is no longer in the business of soaking-up as much of the private-sector's risk-bearing capacity:
And this leftward shift in the net demand to the rest of the market for risk-bearing capacity causes the price of risk to fall, and the quantity of risk-bearing capacity supplied to fall as well. Yes, financial intermediaries that had held Treasuries and thus carried duration risk take some of the cash they received by selling their risky long-term Treasuries to the Fed and go out and buy other risky stuff. But the net effect of quantitative easing is to leave investors and financial intermediaries holding less risky portfolios because they are supplying less risk-bearing capacity...
It is reassuring that I was not stupid--that there is nothing important in general equilibrium that I had missed:
Michael Woodford: Quantitative Easing and Financial Stability: "Conventional interest-rate policy, increases in the central bank's supply of safe (monetary) liabilities, and macroprudential policy...