posted on 17 July 2016
from the St Louis Fed
Many people know that the Federal Reserve affects interest rates. However, many may not know exactly how the Fed does that. An article inThe Regional Economist discusses the various interest rates the Fed sets.
Vice President and Economist Stephen Williamson discussed three interest rates the Fed sets, either as a target or by administrative fiat:
Monetary Policy and the Channel System
Williamson explained that, prior to the financial crisis, the Fed conducted monetary policy using what economists call a channel system. The discount rate was the upper limit, the interest rate on reserves was the lower limit, and the fed funds rate was targeted in between. (It should be noted that the Fed couldn't pay interest on reserves until late 2008, so the lower limit was zero.)
As Williamson pointed out, if the fed funds rate went above the discount rate, then institutions could borrow from the Fed more cheaply than from other institutions. Similarly, if the fed funds rate went below the interest paid on reserves, no bank would lend to another when it could get a higher return by lending to the Fed.
The Move to the Floor System
According to Williamson, the details of how the Fed conducts monetary policy changed in important ways between 2007 and now. In particular, two things happened:
He noted that the large stock of reserves implies that monetary policy works within a floor system now, rather than a channel system, and that the interest rate on excess reserves (IOER) plays a key role. In principle, the Fed could achieve its fed funds rate target by simply setting the IOER.
He wrote: "If the fed funds rate were lower than the IOER, then banks would be able to make a profit from borrowing on the fed funds market and lending to the Fed at the IOER, thus forcing up the fed funds rate. If the fed funds rate were higher than the IOER, then a bank wanting to lend would earn more interest on the fed funds market than by lending to the Fed at the IOER. The large demand for fed funds would then force the fed funds rate down."
However, theory and reality aren't agreeing. Tomorrow's post will examine what has actually happened and describe the adopted solution: a floor with a subfloor.
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