The general rule is that, as interest rates rise, they tend to increase demand for the currency. Due to higher interest rates, major investors tend to follow fixed-rate currencies.
Yet interest rates don’t just exist. Investors also tend to consider various other aspects such as geopolitical factors, economy overall stability, etc. Interest rates in large developed economies have not increased higher than 3% in recent years.
But if you look at developing economies, you can see higher interest rates. Developing economies typically have interest rates of at least 5%, if not more.
One reason for this is that developing economies tend to attract investors. In exchange for higher interest rates, developing economies can use the money to spend on infrastructure or debt financing.
There’s also a risk with higher rates. Most developing economies have no stable geopolitical scenario compared to developed economies. This in itself creates investor risk.
Returning to developed economies where interest rates aren’t that high, even 2% is sometimes considered a good return.
Investors looking for lower risk, but a slightly higher reward tends to chase higher-rate currencies
With interest rates close to 0% in developed countries (and likely to stay that way for many years). Haven't interest rates lost their importance. It is the CHANGE in interest rates that can drive currency changes and as rates are expect to remain the same in all developing countries this is likely to have no impact on fx prices
When there is a rate hike, the currency will appreciate, which means that traders will buy. And when there is a cut, traders will sell and buy currencies with higher interest rates. Once a trader has determined the market movement, it is crucial to place the trade carefully
The modification of interest rates also have an impact on the economy. Lower interest rates can stimulate the economy as it is cheaper to borrow money. Higher interest rates do the opposite and this way they play a role in controlling inflation.