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FRBSF Economic Letter
2020-11 | May 11, 2020 | Research from Federal Reserve Bank of San Francisco

Coronavirus and the Risk of Deflation
Jens H.E. Christensen, James M. Gamble IV, and Simon Zhu
The pandemic caused by COVID-19 represents an unprecedented negative shock to the global
economy that is likely to severely depress economic activity in the near term. Could the crisis
also put substantial downward pressure on price inflation? One way to assess the potential
risk to the inflation outlook is by analyzing prices of standard and inflation-indexed
government bonds. The probability of declining price levels—or deflation—among four major
countries within the next year indicates that the perceived risk remains muted, despite the
recent economic turmoil.

The rapid spread of the coronavirus disease 2019 (COVID-19) and the massive lockdown measures that
policymakers and health officials around the world have taken to combat it represent an unprecedented
negative shock to global demand and supply. On the demand side, social activities like dining out, travel, and
tourism have almost completely halted, and consumer spending more generally has dropped substantially.
On the supply side, production shutdowns that started in China early this year have spread elsewhere, even
as activity in China has ramped back up. This has severely disrupted global supply chains.
Normally such demand and supply restrictions would have offsetting effects on price inflation. However, the
severity and public enforcement of social distancing and shelter-in-place orders suggest that constraints on
demand will dominate. This is already reflected in such things as plummeting global oil prices. Relatedly,
Leduc and Liu (2020) argue that uncertainty effects of the coronavirus shock may reduce aggregate demand
enough to lower the U.S. inflation rate by as much as 2 percentage points. The resulting downward pressure
on prices could undermine the price stability goals of major central banks around the world.
In this Letter, we focus on the risk of a significant drop in inflation from its current level. Specifically, we
assess the risk of deflation—that is, the probability of negative inflation or a net decline in price levels—
within the next year. While an increase in inflation is also a possibility, we focus on deflation risk because it
represents a particular challenge for the credibility of monetary policy in the context of already prolonged
low inflation in many leading economies. To assess this risk, we use yield curve models of nominal and real
government bond yields from four major countries: Canada, France, Japan, and the United States. These
models also allow us to estimate the premium investors attach to this risk. Our results suggest that the risk of
deflation remains muted in all four countries despite the recent global economic turmoil. Furthermore, even
the priced risk of deflation, which measures investors’ aversion to deflationary outcomes, has barely moved,
ticking up only in Japan from already elevated levels. Overall, these results suggest that the perceived odds of
deflation occurring in leading economies as a result of the coronavirus crisis are currently low.

FRBSF Economic Letter 2020-11

May 11, 2020

Consumer price inflation in four major countries
For a global perspective on how the pandemic is likely to affect inflation dynamics, we study data from four
major economies: Canada, France, Japan, and the United States. Figure 1 shows the year-over-year change in
their respective consumer price indexes (CPIs) since 2000. We use these price indexes to adjust the
payments of the inflation-indexed bonds
we consider later in this analysis and
Figure 1
measure the price inflation most relevant
International panel of CPI inflation
for consumers. For Canada and Japan,
Percent
Canada
6
they are the price indexes targeted by the
France
central bank in setting monetary policy,
5
Japan
while this is not the case for France and
United States
4
the United States.
3

We note that CPI inflation dropped
precipitously in all four countries
beginning mid-2008 through 2009 (blue
shading) during the global financial crisis
and never fully recovered to pre-crisis
levels, except in Japan, where inflation
has remained near zero for the entire 20year period. Thus, CPI inflation in all four
countries had already been running
relatively low for the past decade, well
before the onset of the coronavirus crisis.

2
1
0
-1
-2
-3
2000

Pre-crisis
2002

2004

2006

2008

Post-crisis
2010

2012

2014

2016

2018

2020

Note: Blue shading indicates global financial crisis.

The rapid deterioration in economic activity following the spread of COVID-19 shares some similarities with
the economic meltdown during the global financial crisis. Thus, it’s relevant to ask what the downside risks
to the inflation outlook are in the current situation: Will any drop in CPI inflation now resemble the size and
speed of the declines experienced in the global financial crisis?
Considering the lag in collecting and reporting macroeconomic data such as the CPI and the unprecedented
nature of the economic shocks caused by the current pandemic, the historical CPI inflation data in Figure 1
are not likely to be informative about the current state of the economy until many months from now. Instead,
we turn to financial market data, which have several notable advantages at this early point in the crisis. First,
financial data are available in real time and are not subject to revision. More importantly, they reflect
forward-looking expectations among a large and diverse group of investors and financial market
participants.

Yield curve models of nominal and real yields
We consider the prices of conventional fixed-coupon bonds that pay a nominal interest rate and so-called
inflation-indexed bonds. The latter pay a real interest rate because their cash flows adjust with the change in
the CPI and therefore they maintain their purchasing power. Both types of securities are issued and
guaranteed by the national governments in Canada, France, Japan, and the United States and hence carry
minimal credit risk.
2

FRBSF Economic Letter 2020-11

May 11, 2020

The difference between nominal and real yields of the same maturity is known as breakeven inflation (BEI).
This market-based measure of inflation compensation is widely used to assess financial market participants’
inflation expectations. However, there are two potential problems with using BEI for that purpose. First, BEI
contains an inflation risk premium, which investors require for being exposed to the uncertainty of future
inflation. This premium is embedded in nominal yields that provide no inflation protection. Second, there is
a potential difference in market liquidity between standard fixed-coupon and inflation-indexed bonds. The
latter tend to have smaller trading volumes, wider bid-ask spreads, and smaller trade sizes. Consequently,
the prices of inflation-indexed bonds may include a liquidity premium that investors demand for carrying
liquidity risk. This pushes up inflation-indexed bond yields and pushes down BEI, which complicates how
well it reflects inflation expectations. The empirical challenge is that neither the inflation risk premium nor
the liquidity premium is directly observable and they must therefore be estimated.
In the case of Canada, France, and the United States, we adjust for both the inflation risk premium and any
liquidity premiums in the inflation-indexed bond prices using a model of nominal and real yields developed
by Andreasen, Christensen, and Riddell (2018). For Japan, we use the Christensen and Spiegel (2019) model
of nominal and real yields, which adjusts for the value of deflation protection offered by Japanese inflationindexed bonds issued since 2013 and for the inflation risk premium; however the model does not adjust for
any liquidity premiums due to the unusual maturity composition of Japanese inflation-indexed bonds.
Christensen and Spiegel (2019) find that adjusting for the value of this deflation protection is particularly
relevant in the context of Japan’s very low inflation, while Andreasen et al. (2018) find that it plays no role
for the U.S. data. A similar result holds true for our French data, while the issue is irrelevant for Canada
because Canadian inflation-indexed bonds do not protect against deflation. To adjust for these differences,
we account for this deflation enhancement only in the model estimation based on the Japanese data.
Furthermore, as in Christensen and Spiegel (2019), our Japanese model includes semiannual 10-year survey
forecasts of CPI inflation to produce more realistic inflation dynamics.
For all four model estimations, we use end-of-month data through March 2020. The model-implied inflation
dynamics allow us to estimate both the risk of deflation over any relevant horizon as well as the premium
investors attach to that risk.

The risk of deflation
To assess the downside risk to the inflation outlook, we focus on the likelihood of seeing a net decline in the
price level over the following year; this seems to be a relevant length of time to consider in light of the
expected duration of the most intense phase of the spread of COVID-19. Figure 2 shows our estimates of this
one-year probability of deflation for all four countries.
The results reveal that consumer price inflation is not likely to fall negative within the next year given that
the estimated probabilities are near zero, except for Japan, which has only a modest risk of 11%. Thus, these
results suggest that the current economic disruption may play out differently in terms of expected inflation
dynamics than was the case during the global financial crisis.
As noted earlier, inflation-indexed bonds in France and the United States offer protection against deflation
by paying off the original nominal principal at maturity if net deflation has occurred since the bond was

3

FRBSF Economic Letter 2020-11

issued. The same is the case for inflationindexed bonds issued by the Japanese
government since 2013, while Canadian
inflation-indexed bonds do not offer this
protection.
One way of illustrating the importance of
the price of deflation protection, even in
countries like Canada where it does not
apply contractually, is by comparing the
yields of bonds that don’t offer protection
with those that do. Specifically, we
calculate the five-year par-coupon yield of
an inflation-indexed bond without
deflation protection. We then compare it
with the five-year par-coupon yield of a
newly issued inflation-indexed bond that
offers deflation protection and for which
deflation considerations are essential for
pricing.

May 11, 2020

Figure 2
Estimates of one-year probability of deflation
Percent
100

Canada
France
Japan

80

United States
60

40

20

0
2005

2007

2009

2011

2013

2015

2017

2019

Figure 3
Five-year deflation risk premiums
Percent
3

In Figure 3, we show the resulting five2.5
year deflation risk premiums, calculated
as the face value of the five-year yield
2
spreads for all four countries starting in
2005. For Canada and the United States,
1.5
these data series are flat and close to zero.
Thus, deflation risk commands essentially
1
no premium in those two countries. The
French series shows a mild upward trend
0.5
that predates the coronavirus crisis and a
0
modest uptick since its onset. Only Japan
2005
2007
2009
2011
2013
has seen a notable spike in this risk
measure from the already elevated levels related to its near-zero inflation rate.

Canada
France
Japan
United States

2015

2017

2019

We stress that these measures reflect investors’ sentiment about and aversion to deflationary outcomes,
which are only partially correlated with the actual risk of such outcomes examined in Figure 2 at the oneyear horizon. Thus, even in terms of sentiment, investors outside of Japan do not seem to be overly
concerned about significant downside risks to the inflation outlook in the current uncertain situation.

Conclusion
In this Letter, we assess the downside risk to the inflation outlook caused by the unprecedented negative
economic shock following the rapid spread of COVID-19. Analysis of the forward-looking information in
nominal and real government bond yields shows that the perceived risk of an outright decline in the price
4

FRBSF Economic Letter 2020-11

May 11, 2020

level, or deflation, over the next 12 months has barely changed in the four countries we examine.
Furthermore, the premium investors attach to deflationary outcomes has seen at most only a modest uptick,
except for in Japan, where this premium was already elevated thanks to its near-zero inflation. Overall, these
results suggest that the perceived risks of a substantial decline in inflation are limited in the near term
despite the economic standstill caused by the coronavirus.
Jens H.E. Christensen is a research advisor in the Economic Research Department of the Federal Reserve
Bank of San Francisco.
James M. Gamble IV is a research associate in the Economic Research Department of the Federal Reserve
Bank of San Francisco.
Simon Zhu is a research associate in the Economic Research Department of the Federal Reserve Bank of
San Francisco.

References
Andreasen, Martin M., Jens H.E. Christensen, and Simon Riddell. 2018. “The TIPS Liquidity Premium.” FRB San
Francisco Working Paper 2017-11. https://doi.org/10.24148/wp2017-11
Christensen, Jens H.E., and Mark M. Spiegel. 2019. “Assessing Abenomics: Evidence from Inflation-Indexed Japanese
Government Bonds.” FRB San Francisco Working Paper 2019-15. https://doi.org/10.24148/wp2019-15
Leduc, Sylvain and Zheng Liu, 2020. “The Uncertainty Channel of the Coronavirus.” FRBSF Economic Letter 2020-07
(March 30). https://www.frbsf.org/economic-research/publications/economic-letter/2020/march/uncertaintychannel-of-coronavirus/

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