Markets, economists, and policymakers have been fretting
about inflation for months, worried that the trillions of dollars
being spent in recent and future government stimulus
programs could overheat the economy and send prices
On May 12, 2021, the worrywarts seemed to have their fears
confirmed when the April consumer price index shot up a
seasonally adjusted 0.8%, the biggest jump since 2008. The
year-over-year inflation rate of 4.2% is double what the
Federal Reserve has set as its target.
Should consumers be concerned?
As a finance expert, I believe the answer to this question lies
in a closer look at what actually goes into the main way the
U.S. measures inflation.
What is inflation?
Inflation is defined as the change in the price of everything
from a rib-eye steak and a bar of Ivory soap to an eye exam
or tank of gas.
In the U.S., the most commonly used measure of inflation is
based on the consumer price index. Simply put, the index is
the average price of a basket of goods and services that
households typically purchase. It’s often used to determine
pay raises or to adjust benefits for retirees. The year-over year change is what we call the inflation rate.
Since this is an average across a range of categories, the
main number masks lots of key details and big month-to month swings in various goods and services. For example,
airline fares jumped a seasonally adjusted 10% in April –
partly recovering from their pandemic plunge – while shelf-stable fish and seafood declined 3.5%.
Food and energy prices in particular can be very volatile,
and, for that reason, policymakers often focus on what is
known as “core inflation,” which excludes those numbers.
A moderate amount of inflation is generally considered to be
a sign of a healthy economy, because as the economy
grows, demand for stuff increases. This increase in demand
pushes prices a little higher as suppliers try to create more of
the things that consumers and businesses want to buy.
Workers benefit because this economic growth drives an
increase in demand for labor, and as a result, wages usually
increase – as the latest jobs report suggests is beginning to
Workers with higher wages then can go out and buy more
stuff, part of a “virtuous” cycle that keeps the economy
humming. Inflation isn’t really causing all this to happen – it
is merely the symptom of a healthy, growing economy.
But when inflation is too high – or too low – a “vicious” cycle
can take its place. If left unchecked, inflation could spike,
which would likely cause the economy to slow down quickly
and unemployment to increase. The combination of rising
inflation and unemployment is called “stagflation,” and is
feared by economists, central bankers, and pretty much
It’s what can cause an economic boom to suddenly turn to
bust, as Americans saw in the late 1970s. The Fed managed
to reduce inflation to normal levels only after driving up
short-term interest rates to a record 20% in 1979.
What’s behind the increase in the inflation rate?
So, how can we determine if this is happening now? Let’s
take a closer look at what makes up the consumer price
Much of the increase in April was driven by used car and
truck prices, which jumped 10% during the month, by far the
biggest increase of any category that makes up at least 1%
of the index. As has been reported, that was largely due to a
surge in buying by rental car companies, which sold off
much of their inventories early in the pandemic, as well as
the global chip shortage that has reduced production of new
vehicles. Other price increases, such as for lumber and
some electronics, are also tied to short-term supply chain
Increased demand from consumers who have received
stimulus checks is another possible cause of price
increases, but it’s harder to quantify the effect.
Most categories were much lower. Food prices grew 0.4%,
driven by demand for takeout, and energy was down 0.1% –
though that was before May’s East Coast pipeline problems.
Because the consumer price index is made up of a range of
goods and services, it’s often the case that changes in the
index – and therefore inflation – are being driven by just one
or two parts of the economy, as opposed to an across-the board price change. In the case of April prices,
transportation-related items like used vehicles and airfares
and energy services like electricity were the biggest drivers.
And these appear to be transitory increases.
Nothing to fret about – for now
This is why most economists don’t think the U.S. is heading
into a new period of high inflation. Instead, there is evidence
of pent-up demand, particularly for services that were
unavailable during the height of the pandemic in the U.S.,
which may result in some short-term jumps in prices.
There are signs that inflation will be a bit high for another
month or two, but it should return to more normal levels of
around 2% per year by the end of 2021. The Fed is banking
on this as well.
So, back to our initial question: Is there any reason for
I don’t think so, nor do most economists or the Fed. Others,
especially investors, disagree. We won’t know who is
ultimately right for some time.
Meanwhile, consumers can expect to pay a bit more this
summer if they’re finally planning to take a vacation after a
year stuck at home, buy a used car to travel the country or
build a new home. But even at higher prices, these are all
signs of the return of a well-functioning economy – and
Important disclosure information
Authors Richard S. Warr Professor of Finance, North Carolina State University
Disclosure Statement Richard S. Warr does not work for, consult, own shares in or
receive funding from any company or organization that would
benefit from this article, and has disclosed no relevant affiliations
beyond their academic appointment.
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