Decline of oil prices and the negative interest rate policy in Japan

Decline of Oil Prices and the Negative Interest Rate Policy in Japan


In February 2016, the Bank of Japan (BOJ), in order to reach a 2% inflation target, initiated a negative interest rate policy by increasing massive money supply through the purchase of long-term Japanese government bonds (JGBs). This policy flattened the yield curve of JGBs. Banks started to purchase government bonds less frequently, because of the negative yield for both short-term government bonds and even for long-term government bonds up to 15 years. On the other hand, a vertical investment–savings curve in the Japanese economy prevented the growth of corporate bank loans. Except for a few periods, the 2% inflation target could not be achieved. This paper examines this phenomenon, presents the reasons behind it, and offers solutions.

Recent Global Oil Price Movements

Oil prices dropped from over $100 per barrel in June 2014 to less than $30 per barrel in February 2016. Since early April 2016, prices started to increase again because of a fragile improvement in demand, but the priced reached was still less than half of 2014. There are several reasons for this sharp drop, relating to the supply and demand conditions and expectations in the oil market (Yoshino and Taghizadeh-Hesary 2016b). Oil prices have a high impact on Japanese macroeconomic variables especially on price determination, because every year Japan spends almost $150 billion (23% of the country’s imports in 2015) on mineral fuels, including crude oil.

Lower Oil Prices and the Negative Interest Rate Policy of the Bank of Japan

In 2013, the BOJ set a price stability target of 2% (year-on-year rate of change in the consumer price index). On 4 April 2013, the BOJ announced that, based on a decision at its monetary policy meeting, it would purchase Japanese government bonds, effective 5 April 2013. This decision was taken at the first monetary policy meeting after Haruhiko Kuroda had taken up his post as the new governor of the BOJ.

Since 2013, the monetary base increased considerably with the implementation of the quantitative and qualitative easing policy after Prime Minister Abe came into power for the second time. On the liability side of the BOJ’s balance sheet, the monetary base increased from ¥155 trillion in April 2013 to ¥387 trillion in May 2016. In April 2013, the BOJ balance sheet indicated assets of ¥175 trillion, which expanded to ¥426 trillion by May 2016. This amounts to almost a 2.5 times increase in the balance sheet in 3 years. The BOJ made a major purchase of Japanese government bonds (JGBs), which went up from ¥98 trillion to ¥319 trillion in the same period. In other words, these long-term government bonds comprised the major part of the assets. As regards the BOJ’s target to keep to a 2% inflation rate, the Japanese economy experienced an inflation rate that was more than 2% only during certain periods, and mainly during 2014. One of the main reasons for this was an increase in the consumption tax and higher oil prices during that period. However, after the decline of oil prices, the consumer price index (CPI) and the inflation rate fell (Figure 1) to below 1% levels.

Figure 1: General Price Level and the Oil Price
(January 2005–March 2016)

Figure 1: General Price Level and the Oil Price

CPI = consumer price index.
Source: NIKKEI NEEDS Database. 2016. (accessed 5 August 2016).

Contrary to the BOJ’s expectations, the negative interest rate policy also affected the long-term interest rate of government bonds and caused the JGB yield curve to fall and flatten (Figure 2). This means it is not rational to hold government bonds until maturity, as the value of 100 at maturity will be less than 100 (i.e., 99, 98, 97, 96, or less). Hence, investors—especially overseas investors—trade the bonds rather than keep them until maturity. While the nominal interest rate dropped, the volatility of the bond market increased because bonds were trading higher. Long-term bonds of over 15 years have a positive yield, but nobody wants to keep bonds that are shorter than 15 years until maturity because of the negative interest rate.

Figure 2: Japanese Government Bonds Yield Curves

Figure 2: Japanese Government Bonds Yield Curves

Y = years.
Source: Ministry of Finance of Japan, Debt Management Bureau. 2016.

Policy Implications

In the low-oil-price era, the BOJ had to modify the 2% inflation target by lowering it. Secondly, Japan’s monetary policy and negative interest rate policy cannot hope to pull the country out of the current recession and deflationary situation over the long term. It is more important to make investment–savings (IS), curve downward sloping rather than vertical (Yoshino and Taghizadeh-Hesary 2016c), which means that the rate of return on investment must be positive and companies must be willing to invest if interest rates are set too low. The recession in Japan is a result of structural problems (an aging population, a shrinking labor force, low participation of females in the labor force, a conservative banking system, a low level of technology development, slow growth in small and medium-sized enterprises and start-up businesses, low productive agricultural sector) that cannot be solved through the existing monetary policy. The Japanese government needs to focus more on the growth strategies of Abenomics rather than on monetary policy. Yoshino and Taghizadeh-Hesary (2015) give more information on the growth strategies of Abenomics.

Ministry of Finance of Japan, Debt Management Bureau. 2016.
Yoshino, N., and F. Taghizadeh-Hesary. 2015. An Analysis of Challenges Faced by Japan’s Economy and Abenomics. The Japanese Political Economy. 40: 1–26. DOI: 10.1080/2329194X.2014.998591
Yoshino, N., and F. Taghizadeh-Hesary. 2016a. Decline of Oil Prices and the Negative Interest Rate Policy in Japan. ADBI Working Paper series. ADBI: Tokyo.
———. 2016b. Introductory Remarks: What’s Behind the Recent Oil Price Drop? In N. Yoshino and F. Taghizadeh-Hesary, eds. Monetary Policy and the Oil Market. Tokyo: Springer. DOI: 10.1007/978-4-431-55797-5_1
———. 2016c. Causes and Remedies of Japan’s Long-lasting Recession: Lessons for China. China & World Economy. 24: 23–47. DOI: 10.1111/cwe.12149

Photo: Fg2 [Public domain], via Wikimedia Commons

Naoyuki Yoshino

About the Author

Naoyuki Yoshino is Dean and CEO of the Asian Development Bank Institute and professor emeritus at Keio University, Tokyo.
Farhad Taghizadeh-Hesary

About the Author

Farhad Taghizadeh-Hesary is an associate professor of economics at Tokai University, Japan, and a visiting professor at Keio University, Japan.
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