NOT even a rally in oil prices could cajole investors from moving on Wednesday, as they sat on the sidelines ahead of the United States Federal Reserve's interest rate decision to be announced around 2am Singapore time on Thursday.

The benchmark Straits Times Index ended the session in the red, down 0.19 per cent or 5.97 points at 3,137.43, pulled down by laggers including Jardine Matheson and DBS, which offset gains of movers such as Wilmar International.

Turnover came in at 2.26 billion units worth S$1.2 billion, with 247 losers versus 203 gainers.