SINGAPORE - The stock market suffered a Christmas hangover, with shares opening lower across the board on light trading.

OCBC Bank, unusually, was the most active stock on turnover of 3.4 million units 15 minutes into the trading day.

The shares fell by six cents, or 0.6 per cent, to $10.39.

DBS Group Holdings and United Overseas Bank were also in the red, dragging the Straits Times Index down by 9.84 points to 3,336.07.

Offshore related stocks, Keppel Corp and Sembcorp Marine, fell as Brent crude eased to almost below US$60 a barrel.