Japan's Hidden Century: How Cheap Money Fuels Global Risk

Japan's economic strategy has inadvertently created a Japanese century in global finance, driven by the yen's role as a cheap and reliable funding currency. The Bank of Japan's loose monetary policy has suppressed yields on public debt, effectively creating a publicly subsidized funding pipeline for bankers.

By borrowing cheaply in yen and investing in higher-return assets, such as US equities, global investors have profited tens of billions of dollars from the 'yen carry trade'. This trade surged after the pandemic, with speculators betting $435bn in the two years to 2024 out of the estimated $1.7tn worth of yen supplied.

Despite Japan's first rate hike since 2007 in March 2024, the carry trade remains popular. However, a persistent fear exists that the BoJ may aggressively raise rates, risking a global financial shock. A stronger yen would increase the cost of repaying yen-denominated debts, and heavily leveraged hedge funds could face significant losses.

Japan's economic success has created an external dependency on the carry trade to manage internal crises. The country's reflationist prime minister, Sanae Takaichi, is committed to fiscal expansion, which may continue to stabilize the private sector but not necessarily drive growth.

Economic analysis suggests that Japan's growth constraints are rooted in its macroeconomic prices, including profit, exchange rate, interest, wages, and inflation. While Japan has seen recent real wage growth, wages have historically been flat or falling, and the country's firms lack a reliably competitive exchange rate and viable profit rate to drive demand and reform.