What about Japan?

2026

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AI-generated summary

1) This paper analyzes how Japan's unique monetary policies have created a significant duration mismatch on its government's balance sheet, leading to substantial excess returns for the public sector but potentially negative welfare consequences for less financially sophisticated households.

2) * The Japanese public sector has engineered a massive duration and currency mismatch on its balance sheet by absorbing currency and interest rate risk, earning significant excess returns on its risky investments.
* This strategy, driven by low-rate policies and financial repression, has allowed Japan to sustain high debt levels and fiscal deficits, but it comes at the expense of potentially expanding the government's fiscal space while creating a large welfare loss for a significant portion of the population.
* The study highlights that while financially sophisticated households benefit from lower interest rates, less sophisticated ones, particularly younger and lower-income households, suffer welfare losses, indicating a regressive distribution effect and an intergenerational transfer.

3) Japan, fiscal policy, monetary policy, financial repression, duration mismatch

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