DRC reportedly bans exports of Copper and Cobalt concentrate, according to sources citing an official order

• To tax economically significant mining by-products under a new regime using a 55% valuation; takes effect in three months, but miners must start declaring byproducts in exports immediately. 

Kinshasa has form here: restrictions on concentrate exports have been used repeatedly as leverage to force domestic processing capacity, and prior episodes have tended to follow a sequence of announcement, negotiation with the large miners, partial exemptions or delays, and eventual enforcement diluted from the initial text. The immediate transmission channel runs through the concentrate market rather than refined metal, so treatment charges and the smelter balance are the first places this shows, with Chinese smelters the most exposed buyers of DRC concentrate. The byproduct taxation element matters separately: reclassifying byproducts at a fixed valuation raises the effective fiscal take on cobalt and other co-products of copper mining, which historically compresses miner margins and has at times fed through to slower ramp-ups or contested invoices. The declaration requirement taking effect immediately, ahead of the three-month start, is the tell for how seriously enforcement will run; past rounds have seen early administrative friction at borders before any formal ban bites. What is worth watching is the response of the major operators with Congolese assets, whether exemptions or transition terms emerge, and any counterparty response from Beijing given the concentration of Congolese output in Chinese-linked offtake.