October 24, 2017 MB price quotation:
Cobalt (Co: greater than 99.8%) : $30.38 / lb, more stable than the previous day;
Cobalt (Co: greater than 99.3%) : $29.9 / lb, more stable than the previous day.
On October 23, the cobalt commodity index was 157.79, with a period of 157.85 points (2017-10-10), which fell by 0.04%, up 125.93% from 69.84 points, which was the lowest point on July 05, 2016. (note: cycle refers to 2011-09-01).

The MB quotation is based on the price benchmark of metals and minerals offered by the independent quotation institute (MetalBulletin) for traders and suppliers. The MB will be quoted twice a week. This pricing mechanism is not transparent and can easily lead to market manipulation. Although the pricing mechanism has been criticized, the LME has tried to replace the MMB pricing system with cobalt futures, but the effect is not obvious.