Although headline inflation continues to fall and
unemployment is near a 50-year low, the Federal Reserve still faces some tricky
policy decisions over the next few months. Many of these have to do with the
unusual volatility of relative prices during the 2021-2022 inflation, a topic
that I wrote about in a
recent
commentary. This piece picks up where that one left off. It focuses on the
behavior of the subset of prices that constitute the so-called
supercore
relative to prices that are more flexible.
Supercore prices have been in the news lately because some
observers think the Fed is targeting them. This commentary will argue a focus
on supercore inflation may have led to a more-than-prudent degree of monetary
policy tightening by late 2022 and early 2023. The fact that high
interest rates appear to have been a contributing factor to the banking crisis
that was touched off by the failure of Silicon Valley Bank in March only
strengthens the case.
So, what is the supercore?
So, what, exactly, is the supercore? The notion of ordinary
core prices is familiar enough. The core consumer price index, for example, is
the ordinary CPI with the highly volatile prices of food and energy removed.
The personal consumption expenditures index, a CPI alternative, also has a core
version that removes the same two sectors. Measures of the supercore go further
by removing still more items.