What is the yen carry trade and why did it matter?
The yen carry trade involved borrowing in yen at near-zero rates, converting to dollars, and buying higher-yielding foreign assets. It created large, steady capital outflows from Japan that supplied global liquidity and supported demand for US Treasuries and other assets.
How did the Bank of Japan's yield curve control enable this system?
Yield curve control kept long-term Japanese yields near zero for decades, making borrowing in yen extremely cheap. That persistent low-yield environment made the carry trade profitable and Japanese investors persistent, price-insensitive buyers of foreign debt.
Why does repatriation of Japanese capital threaten US bond markets and mortgage rates?
If Japanese investors reduce overseas purchases and bring capital home, demand for long-term US Treasuries falls. Lower demand pushes Treasury yields higher, which raises mortgage rates and reduces valuations across equities and credit markets.
If the Fed cuts short-term rates, will mortgage rates and financial conditions automatically ease?
Not necessarily. Short-term Fed cuts don't directly set long-term yields. If global buyers like Japan step back, long-term yields can stay elevated, keeping mortgage rates high and financial conditions tighter despite Fed easing.