Do suppressed long-term bond yields keep a currency under depreciation pressure?
Core argument: Japan's 30-year government bond yield sits barely above Germany's despite a far higher gross public debt burden, which the author reads across G10 economies as evidence that Japan's long-term yields should be much higher.
The chart, which - for all G10 economies - shows the 30-year government bond yield on the vertical axis and gross public debt on the horizontal axis. Despite its much higher debt burden, Japan’s 30-year yield is barely higher than that of Germany. This is the best illustration that Japan’s long-term yields should be much higher. As long as that’s not allowed to happen, the Yen remains under depreciation pressure, and intervention will become increasingly ineffective. One way or another, $/JPY is going to 170.

