The impact of interest rate cuts on borrowing costs, particularly for mortgages, clearly illustrates the difference between a 25 bps and a 50 bps reduction in savings. This is how either decision could affect you, according to Aluma Capital economist Frederick Mitchell.


The Federal Reserve Bank in the US has cut its benchmark interest rate by 50 basis points (bps), 25 bps more than most market analysts anticipated. This unexpected monetary shift could pave the way for the South African Reserve Bank (SARB) to consider a similar move in its interest rate decision on Thursday.

While most analysts predicted a 25 bps reduction, it is understood that the SARB makes its decisions based on what it deems best for the economy, taking into account inflation expectations.

Lower interest rates lead to several positive effects, including:

  • Reduced borrowing costs for goods and services purchased on credit or financed assets.
  • Increased consumption expenditure, as lower credit costs enhance disposable income for households and consumers.
  • Refinancing of assets, which could release funds and further increase disposable income, potentially driving demand in the economy and fostering economic growth.

However, there are some downsides to lowering interest rates:

  • Decreased savings incentives for savers, as lower rates result in reduced income from savings over time.
  • Potential inflationary pressure, as lower interest rates may boost demand for goods and services, possibly restarting the inflation cycle.
  • Rising asset prices, as lower rates can lead to significant increases in prices for assets like homes.

The impact of interest rate cuts on borrowing costs, particularly for mortgages, clearly illustrates the difference between a 25 bps and a 50 bps reduction in savings.

The table below shows the potential savings households could experience if interest rates are reduced by either 25 bps or 50 bps. This table accounts for bond and administration costs, which may differ from other asset amortization calculators available. A 50 bps cut would free up more funds in household budgets, allowing for spending on other discretionary items that households may desire.

Increased demand for goods and services could ignite the “economic spark” that the South African economy desperately needs to facilitate faster economic growth than current forecasts suggest.

(Supplied/Aluma Capital)

Frederick Mitchell is an economist at Aluma Capital.

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