A weak economy does not automatically produce a rate cut, and understanding why is one of the more useful things a borrower can learn. A central bank holding rates while growth is close to zero is usually doing so because a weak currency is expected to push inflation up, and its mandate is inflation rather than growth.
The monetary policy committee meets several times a year, and political uncertainty consistently shows up in its reasoning because it drives the currency.
The mandate is inflation, not growth
Calls to cut rates to help a struggling economy are asking the committee to do something outside its primary objective. Knowing that prevents an owner from planning around a cut that was never likely, and points attention at inflation expectations instead, which is what actually determines the decision.
A weak currency raises prices with a lag
When the rand falls, imported goods, fuel and anything priced in dollars cost more within months. The committee raises or holds rates in anticipation of that. For a business with imported inputs, currency weakness and the rate decision are the same event arriving twice.
Political uncertainty transmits through the currency
Investors deciding whether to hold South African assets respond to political events, which moves the rand, which moves inflation expectations, which moves rates. That chain explains why political events affect a borrower’s interest cost with no policy change at all.
A holding pattern is a planning instruction
When rates are held pending an event, borrowing costs are unlikely to fall before it. For a business considering a capital purchase, that is useful: either act on current terms or wait with a clear sense of what to watch for.
Read the statement, not the headline
Each decision is accompanied by reasoning explaining what the committee is seeing in inflation, growth and the currency. Those statements, published by the South African Reserve Bank, signal the direction of the next decision more reliably than any forecast.
Frequently asked questions
Why are rates held when the economy is weak?
Because the mandate is inflation rather than growth, and a weak currency raises expected inflation regardless of how slow the economy is.
How does a weak currency affect prices?
Imported goods, fuel and dollar-priced inputs cost more within months, which is what the committee anticipates in its decision.
How do political events reach interest rates?
Through investor appetite for local assets, which moves the currency, which moves inflation expectations, which moves rates.
What does a holding pattern mean for a business?
Borrowing costs are unlikely to fall before the event being awaited, so either act on current terms or wait knowing what to watch.
What is the most useful thing to read?
The policy statement accompanying each decision, which signals the direction of the next one better than external forecasts.
Further reading
Originally published in November 2017. Updated September 2026 to explain why rates stay high in a weak economy, using the lead story from the original roundup.
