(Adds forecasts, analyst comments)
By Aradhana Aravindan and Anshuman Daga
SINGAPORE, Jan 25 (Reuters) - Singapore's central bank said on Tuesday it was tightening its monetary policy settings, in an out-of-cycle move, as global supply constraints and brisk economic demand fan inflation risks.
The Monetary Authority of Singapore (MAS) manages monetary policy through exchange rate settings, rather than interest rates, letting the local dollar rise or fall against the currencies of its main trading partners within an undisclosed band.
It adjusts its policy via three levers: the slope, mid-point and width of the policy band, known as the Nominal Effective Exchange Rate, or S$NEER.
The MAS said it would raise slightly the rate of appreciation of its policy band. The width of the policy band and the level at which it is centered will be unchanged.
Selena Ling, head of treasury research and strategy at OCBC, said she expects the central bank to tighten again in April, describing Tuesday's move as only a "slight tightening" of the slope.
"If they had announced a more aggressive tightening today, then that would have dampened expectations for April," Ling said.
Tuesday's tightening came just a day after data showed Singapore's key price gauge climbed https://www.reuters.com/world/asia-pacific/singapore-core-inflation-rises-fastest-pace-nearly-8-years-2022-01-24 in December by the fastest pace in nearly eight years.
"This move builds on the pre-emptive shift to an appreciating stance in October 2021 and is appropriate for ensuring medium-term price stability," the MAS said, referring to its tightening move late last year.
The central bank is scheduled to review settings at a semi-annual policy meeting in April, when it was widely expected by economists to make a tightening move.
The Singapore dollar strengthened to 1.3425 versus the U.S. dollar following the surprise move, its highest since October 2021.
The MAS said it expects core inflation to be 2.0–3.0% this year, from the 1.0–2.0% expected in October. Headline inflation is expected to be 2.5–3.5%, from the earlier forecast range of 1.5–2.5%.
"While core inflation is expected to moderate in the second half of the year from the elevated levels in the first half as supply constraints ease, the risks remain skewed to the upside," the MAS said.
The economy is expected to grow 3-5%, unchanged from earlier forecasts.
(Reporting by Aradhana Aravindan and Anshuman Daga in Singapore; Additional reporting by Sonali Desai in Singapore; Editing by Christian Schmollinger and Sam Holmes)