Hong Kong-based Noble Group's stock falls 49% in a day

The shares of Hong Kong-based commodity trader Noble Group sank as much as 49% on Thursday after it warned of a quarterly loss of as much as $1.8 billion. This takes their declines to 77% this year. Noble Group, which has been in crisis for over two years, recently announced the sale of its gas-and-power unit to rival Mercuria Energy.