
Time to Reform the Ghana Reference Rate: From treasury bill yields to banks’ deposit costs
How the formula works Existing componentWeightWhat it represents Monetary Policy Rate (MPR)40%The central bank’s policy signal Interbank rate (IBR)20%The rate banks pay to borrow from one another Reserve-adjusted 91-day Treasury bill rate (T₉₁)40%Government’s short-term borrowing rate, increased for reserves and vault cash Here, T₉₁ is the annualised 91-day Treasury bill rate. The Treasury bill component has more leverage than it appears With CRR at 20% and CIV at 2%, a one percentage-point rise in the raw Treasury bill rate increases the formula-based GRR by 0.513 percentage points.


















