You may have gotten the order wrong, MAS manages the FX rates and the interest rates is a consequence, since that's the monetary stance taken.
So if SGD is stronger, SGD rates would be lower since the Fx gains would compensate for some of the returns VS fair value in USD.
Sounds reasonable also.
If MAS manages the rates locally, capital inflows would require MAS to mop up a lot of these demand for SGD, to keep rates high and comparable to USD, if you may see major capital outflows if left unchecked (as rates decline, and money supply increase and drive inflation) by the non flight to safety flows. So it's really a balancing act.
Not sure if I understood the above, if you could rephrase it will be good.
I pose the question to ChatGPT. The answer isn't clear.
Q: If MAS allowed SG rates to be lower, SGD will fall against the USD.
A: MAS stands for Monetary Authority of Singapore, which is Singapore's central bank. SG rates refer to the interest rates in Singapore. If the MAS were to allow SG rates to be lower, it could potentially lead to a decrease in the demand for SGD, as investors may seek higher yields in other currencies. This could lead to a decrease in the value of SGD against USD, as there would be less demand for SGD in the foreign exchange market.
However, it is important to note that exchange rates are determined by a variety of factors, including but not limited to interest rates. Other factors that could impact the value of SGD against USD include economic growth, inflation rates, political stability, and global economic conditions. Therefore, it is not certain that a decrease in SG rates would lead to a corresponding decrease in the value of SGD against USD.