SINGAPORE - Shares of Singapore-listed commodities trader Noble Group plunged as much as 11.8 per cent to 33.5 Singapore cents, their lowest since October 2008.

The shares retraced some ground to trade at 35 cents, down 7.9 per cent, at 11:57 am.

Their latest downturn was triggered by financing concerns after a fresh commodities and oil sell-off this week and a Moody's credit rating downgrade to junk status on Dec 29.