Bank of Japan Raises Rates to 31-Year High, Signaling End of Cheap Yen Era
The Bank of Japan (BOJ) has shifted further away from its decades-long ultra-loose monetary policy, raising its benchmark interest rate to the highest level in 31 years. On 18 September, the Policy Board voted 7-2 to increase the uncollateralized overnight call rate by 25 basis points to 1.25%, a level not seen since 1995, as documented in the central bank’s monetary policy decisions. The move was widely anticipated by markets. Board members Toichiro Asada and Ayano Sato, who are appointees of Prime Minister Sanae Takaichi, dissented from the decision.
The BOJ stated that while the economy is undergoing a moderate recovery, it remains weak due to Middle East tensions. However, the central bank noted underlying inflation is rising toward its 2% price stability target and signaled it will continue to raise rates and taper easing if the outlook materialises.
Impact on Crypto and Carry Trades
The decision has significant implications for global crypto markets because the yen has historically served as the world’s cheapest funding currency. However, that foundation is eroding. Since exiting negative rates in March 2024, the BOJ has raised rates six times, with this latest hike arriving just three months after the previous one.
Every rate hike raises carry costs, encouraging Japanese institutions to repatriate capital. Despite the hike, the yen weakened to 156.9-157.1 per dollar. Analysts at Daiwa Securities and SMBC stated that the dovish dissents tempered expectations for aggressive future hikes. For crypto, this creates a dual risk: a strengthening yen could tighten dollar liquidity and fuel deleveraging in perpetual futures, while a softer yen supports risk appetite but extends range volatility, especially since the Fed also tightened monetary policy in the wake of record energy prices.
Implications for Exchanges and Stablecoins
Japanese exchanges like bitFlyer and Coincheck face vulnerability to shifting domestic retail sentiment, as higher yen deposit yields could diminish allocations to volatile assets. Meanwhile, the Financial Services Agency has designed a framework for licensed stablecoin providers, making Tokyo a regulated issuing hub for firms such as Circle. For institutional flow, arbitrage schemes leveraging spot bitcoin ETFs against CME futures depend on cheap funding; the rising spread hurdle increases as Japan’s rate climbs from zero to 1.25%.
[Embedded Tweet]
The End of the Free Yen Era
While today’s market leverage is lower than in April 2024, with visible ETF flow forming a more durable support level, the shift to 1.25% cements the end of the free-yen-liquidity era. Looking ahead, October’s outlook statement and December’s meeting are key milestones. Based on swap markets, there is an approximately 83% implied probability of another hike in the coming quarters, though some desks are pricing in quarter-by-quarter moves of 25 basis points. The dissension within the board raises questions about political support for monetary tightening under the current administration. As Japan pulls out of the regime that used the yen as a globally traded funding currency, crypto markets must now more accurately price the cost of capital in a world where the BOJ prioritizes inflation management.
