The recent plunge in share price of Singapore-listed commodities firm Noble Group is an opportunity for investors to buy the stock at a deep discount, one market watcher told CNBC.

"In their business, it is conceivable that there's a lot of fluctuation in their profits and in their cash flow positions and that's something investors need to account for. And in this case, it is conceivable that they would recover from the losses that they've just faced," Nirgunan Tiruchelvam, director at Religare Capital Markets, said on CNBC's "The Rundown."