UOB led the gains after its stock rose 0.23%.
The Straits Times Index ended 3.82 or 0.11% lower at 3,361.05.
The top active stocks were DBS, which rose 0.19%, Singtel, which dropped 0.56%, UOB, which edged up 0.23%, OCBC, which slipped 0.35%, and CapitaLand Commercial Trust with a 0.92% fall.
The FTSE MidCap inched up 0.1% whilst the FTSE Small Cap dipped 0.13%.
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