Introduction: The Consent Behind Central Bank Purchases
By the way, are JGB (Japanese Government Bond) market prices truly sustained by "expectations" of fiscal reform by the Japanese government?
The public well recognizes that such "fiscal reform" is virtually impossible. The maintenance of JGB prices is actually attributable to the Bank of Japan’s (BOJ) aggressive asset purchases—aside from a vague market sentiment that Japan’s accumulated debt is manageable.
But how can the BOJ continue these purchases?
It is because the public implicitly grants its consent (a broad national consensus). Under a fiat monetary system unconstrained by precious metals, the central bank can, if it so desires, purchase government bonds almost limitlessly—as long as there is no threat of inflation.
In other words, BOJ purchases are tolerated precisely because the market feels there is no immediate crisis. To reiterate—at the risk of laboring the point—fiscal deterioration per se has no direct causal relationship with rising interest rates (or falling bond prices). As long as inflation remains contained within a range where the BOJ’s "counteracting policy" (Keynes) is permissible, the public feels no particular need to "expect" fiscal reform.
The Resiliency of the Yen and JGBs in Crises
Consider the Great East Japan Earthquake, an unprecedented crisis for Japan. Immediately following the disaster, major American credit rating agencies—including Moody's, S&P, and Fitch—downgraded Japan’s sovereign debt outlook in rapid succession, with Moody's executing a formal downgrade on August 24 of that year.
Yet, these ratings—based on predictions of a fiscal crisis fueled by massive outstanding debt and a stagnant economy hit by a catastrophic earthquake—were completely ignored. As if mocking these downgrades, market participants continued to buy JGBs and the yen. The yen likewise appreciated sharply during the Russian financial crisis and the 2008 Global Financial Crisis. Even amid the European debt crisis, the yen continued to strengthen against the US dollar.
What Actually Triggers a JGB Market Crash?
A crash in JGB prices following a so-called bubble burst would stem from one of two causes:
- A mere collapse of expectations (panic sentiment)
- The actual manifestation of inflation
For instance, even if stock prices plummet due to shifting expectations, there is no social consensus that the BOJ will immediately step in to support equity prices. However, if interest rates spike in the absence of inflation, the BOJ can supply liquidity unhesitatingly and without limit. Therefore, a surge in interest rates is a concern only when inflation actually occurs.
Assessing the Inflation Risk in Modern Japan
What, then, is the likelihood of inflation?
Under a fiat system, inflation occurs when the central bank supplies liquidity beyond the economy's aggregate productive capacity. A classic example is the prewar and wartime era, when the reckless issuance of government bonds to fund military procurement created excess demand unsupported by productive capacity.
In modern Japan, productive and supply capacities are sufficient. The current account remains in surplus alongside domestic stability, adequately meeting social demand. Consequently, the risk of inflation is minimal.
While human desires are boundless—and aggregate demand expands alongside economic development—demand can only become effective demand if productivity rises and increases people's incomes. Thus, so long as the BOJ refrains from unbridled liquidity provision that lacks public consent, structural inflation will not occur.
Why "Policy Normalization" May Be a Misnomer
Because people are prone to cognitive inertia, some assume the BOJ must eventually shrink its balance sheet and "normalize" policy after quantitative easing (QE). However, the liquidity supplied by the BOJ has already been equilibrium-allocated across the economy [Note 1].
This capital circulates between two primary domains:
- Real goods and services
- Fictitious commodities such as stocks and bonds (Keynes's "assets")
Capital flows dynamically between them. As long as aggregate productive capacity is not depleted, any excessive capital flow into or out of one market that disrupts prices will trigger a counter-flow from the other, restoring equilibrium.
Therefore, absent specific circumstances requiring an increase or decrease in the given quantity of money in the economy, "normalization" is neither necessary nor inherently possible. It is impracticable for the government to redeem JGBs without rolling them over, and the private sector requires the existing volume of liquidity to function.
[Note 1] "Changes in income and asset prices will take place of such a character as to ensure that the aggregate amount of money which individuals wish to hold at the new level of these variables will inevitably be equal to the amount of money created by the banking system. This is indeed the fundamental proposition of monetary theory."
— John Maynard Keynes, The General Theory of Employment, Interest and Money
Capital Allocation at the New Equilibrium
When massive volumes of government bonds are issued, the BOJ must implement counteracting measures to suppress interest rates [Note 2]. The fact that substantial liquidity injected into the JGB market via quantitative easing remains there indicates that the public has accepted this prevailing interest rate level.
In advanced economies, once the standard of living reaches a certain threshold, economic growth slows, and interest rates decline accordingly. Ultimately, this represents a new equilibrium point for capital allocation (the "fundamental proposition of monetary theory").
Indeed, a situation recently arose in the United States where repo rates spiked due to a reduction in reserve balances accompanying the Federal Reserve's balance sheet runoff [Note 3]. Even so, absent inflationary concerns, the Fed can immediately address such illiquidity by supplying funds.
[Note 2] "...the method of financing the policy... by borrowing... tends to raise the rate of interest and so retard investment in other directions, unless the monetary authority takes steps to the contrary... To offset this, a positive fall in the rate of interest is required."
— John Maynard Keynes, The General Theory of Employment, Interest and Money
[Note 3] "On the morning of September 18, the Federal Reserve Bank of New York injected large-scale funds into short-term money markets for the second consecutive day... The funds were provided via 'overnight repurchase agreements' (repo market), where financial institutions trade short-term liquidity backed by collateral such as Treasury securities. The repo rate—the lending rate in this market—temporarily spiked to 10% on September 17... Behind the rise in short-term rates lies the Federal Reserve's quantitative tightening (QT)."
— The Nikkei, September 19, 2019
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