Over time, the benefits of our asset purchases may be diminishing. For example, given how low interest rates currently are, it is possible that future asset purchases will not ease financial conditions by as much as they have in the past. And it is also possible that easier financial conditions, to the extent they do occur, may not provide the same boost to the economy as they have in the past.
In addition to the possibility that our policies may have diminishing benefits, they also may have some risks associated with them. I will mention four: credit risk, interest rate risk, the risk of adverse market functioning, and inflation risk. These and other risks are not easy to see or measure, but they need to be taken into account when setting monetary policy…
It is critical that we take these risks into consideration as we make our asset purchase decisions. To minimize some of these risks, we could aim for a smaller sized balance sheet than would otherwise occur if we were to maintain the current pace of asset purchases through the end of this year, as some financial market participants are expecting. This course of action would be all the more attractive if the economic outlook continues to improve, as I expect it will.
To explain this more clearly, if you could picture two lines, one sloping downward, representing the diminishing benefits of our policy actions, and one line sloping upward, representing the rising costs of those actions, we need to think carefully about where those lines will intersect. Those lines will cross at the point where the costs and benefits are equal, and where further policy actions might cause more harm than good. Reasonable people will differ on where that point of intersection may lie, especially given that many of the policy tools we are using are unconventional…
I will conclude by saying that the FOMC’s actions in the current economic cycle have been needed, understood, and generally supported. Going forward, we must take care to balance the costs and benefits of our monetary policy actions, so that we don’t introduce more uncertainty and create problems that hamper our ability to provide a balancing weight to our economy if needed down the road.