Are credit-market interest rates downwardly rigid in their risk passthrough?
摘要
This paper investigates whether financial risk can lower rather than raise business lending rates, using U.S. data from 1998 to 2022, including the zero-lower-bound (ZLB) period. Within a loanable-funds framework, the autoregressive distributed lag (ARDL) estimates of steady-state multipliers, cointegration relationships, and asymmetric adjustments reveal a negative risk-rate relationship: heightened financial risk reduces investment more than saving, lowering equilibrium lending rates even as risk premiums rise. These results align with financial-friction and low-rate theories, including credit-rationing, financial-accelerator, and reversal-rate mechanisms. The findings highlight the limits of monetary easing in low-rate environments and call for macroprudential measures that mitigate investment risk and strengthen credit transmission.