Why did the dollar depreciate as US yields rose?
Core argument: Under long-run uncovered interest rate parity, a 50 bps rise in U.S. long-term yields relative to European yields implies about 5% dollar appreciation, yet the dollar depreciated 3.6%, leaving an 8.6% gap.
With long-run uncovered interest rate parity as the benchmark, a 50 bps increase in U.S. long-term yields relative to European yields should immediately appreciate the dollar by about 5%. Yet, we observed 3.6% depreciation, leaving a surprising gap of 8.6%. Back of the envelope calculation suggests investors have permanently decreased their willingness to pay for the safety and liquidity not just of US Treasurys, but of all dollar-denominated assets. If investors had only revised their willingness to pay for the safety of Treasurys, then we would have only predicted a much smaller 83 bps depreciation of the dollar. Figure 3 plots the dollar exchange rate against the fitted value with the yield spread and with the convenience yield, measured by the 1 year basis. When we include the basis, the fitted value tracks the actual exchange rate dynamics quite well. The model without the basis completely misses the dollar depreciation between April 4 and 14. [The degree of] sensitivity of the dollar exchange rate to the widening of the Treasury basis suggests that investors are fleeing from the dollar, not just from Treasurys






