It is the other way round from what you mentioned in your first statement. See extract from
MAS website in blue:
Monetary Policy
Singapore’s monetary policy has been centred on the management of the exchange rate since the early 1980s, with the primary objective of promoting medium term price stability as a sound basis for sustainable economic growth. The choice of our monetary policy regime is predicated on the small and open nature of the Singapore economy.
There are three main features of the exchange rate system in Singapore.
1. The Singapore dollar is managed against a basket of currencies of our major trading partners.
2. MAS operates a managed float regime for the Singapore dollar with the trade-weighted exchange rate allowed to fluctuate within a policy band.
3. The exchange rate policy band is periodically reviewed to ensure that it remains consistent with the underlying fundamentals of the economy.
There has been no change in their policy stance since the time we were taught Economics two decades ago and beyond. We have to accept that a small open economy like Singapore has to be a price taker (price refers to interest rate in this context) and it is difficult for the regulator to control both interest rate and exchange rate at the same time. If interest rate is set higher, inflow of funds for Singapore dollar will cause Singapore dollar to appreciate and we lose our export competiveness. If interest rate is set too low, the outflow causes Singapore dollar to depreciate and we get imported inflation. Hence, interest rate is left to find its equilibrium while MAS pursue its policy objective of stabilising the Singapore dollar to maintain a balance between export competiveness without too much domestic inflation. On most occasions, MAS' policy stance is to achieve a slow appreciation of the Singapore dollar.