Bloomberg reported some companies saw unusual trading on the Jakarta Composite Index on Monday including nickel producers.

As quoted in the market news:

Nickel producers: Nickel futures retreated 3.8 percent to $20,705 a metric ton in London on Feb. 10, the most since Dec. 14. PT Vale Indonesia (INCO) , the nation’s biggest producer of the metal, dropped 4 percent to 3,650 rupiah and PT Aneka Tambang (ANTM) , the second largest, declined 2.6 percent to 1,860 rupiah.

Click here to read the full Bloomberg report.