Journal of Empirical Studies 2312-623X 2312-6248 10.18488/journal.66.2021.81.13.24 Journal of Empirical Studies Interest Rate–Economic Growth Nexus Under Currency Board Operations Journal of Empirical Studies Journal of Empirical Studies 06-2021 2021 06-2021 06-2021 8 1 13 24 02 Aug 2021 22 Sep 2021 This paper analyses the effect of the prime interest rate as a monetary policy instrument to stimulate economic growth in Namibia, a small open economy that is constrained by currency board operations. A Vector Autoregressive Model (VAR) was used for the period 1980–2019. The result shows that Namibia’s prime interest rate has no significant effect on economic growth. This finding remains robust and consistent when impulse response function and variance decomposition are employed. The impulse response function indicates a shock on the prime interest rate exhibits an inverse relationship. However, this effect is insignificant in both short and long-run scenarios. The variance decomposition indicates that the prime interest rate has a strongly exogenous impact, implying it has a weak influence on GDP growth. Policy implication indicates that small open economies under currency board operations need to identify different policy responses to circumvent external shocks and addresses their development needs.