Singapore blue chips were lower at around noon on Wednesday, raising the possibility of a fifth straight day of declines.
The Straits Times Index was behind by 10.89 points, or 0.35 per cent, to 3,117.86.
Decliners on the index included commodities trader Noble Group, behind by 2.5 cents or 3 per cent to 81.5 cents.
The broad market was doing slightly better than blue chips, with gainers outnumbering losers slightly, by 157 to 152.
The FTSE ST Mid Cap Index was up 0.18 per cent.
In a data-light week, traders have been left to worry about the possibility of an impending reduction in money-printing by the United States Federal Reserve.
Minutes from the July Fed policy meeting are due out later Wednesday, and will be closely studied for clues. Many economists expect tapering to be announced at the September meeting.