Dynamics of Money Market Interest Rates in Ghana: Time‐Frequency Analysis of Volatility Spillovers

Nana Kwame Akosah, Imhotep Alagidede () and Eric Schaling

South African Journal of Economics, 2021, vol. 89, issue 4, 555-589

Abstract: As the second longest practicing inflation targeting economy in Africa, it is of interest to investigate the degree to which policy interest rate influences other money market rates so as to gauge the overall effectiveness of monetary policy transmission in Ghana. This study evaluates the degree of connectedness among money market rates and also determines the most dominant money market rate(s) in Ghana. The basic finding is that the monetary policy rate has a low‐to‐moderate influence on volatility dynamics of other money market rates in Ghana across historical time‐interval and time‐frequency domains. This is a reflection of a generally weak capability of policy interest rate to drive other market rates in Ghana. Both monetary policy rate and Treasury bill rate are net transmitters of shocks, while interbank, lending and saving rates are net receivers of shocks in the money market. However, the Treasury bill emerges as the largest shock transmitter in the money market, across all forecast horizons and analytical domains. The lending rate is the largest shock recipient in the money market, largely from the Treasury bill rate which suggests ample evidence of fiscal dominance in Ghana. The study accentuates the exigency for monetary and fiscal policies to expeditiously address the domestic structural bottlenecks, especially in the financial sector and the fragile fiscal profile, in order to strengthen policy transmission in Ghana.

Date: 2021
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