The price of copper is down nearly 1 percent Wednesday, trading data showed. An appreciating dollar and news from Poland are holding back demand for the industrial metal.

December futures on copper on the Comex exchange fell by 0.81% to $3.789 a pound (about 0.45 kilograms).

At London Metal Exchange (LME) on Tuesday, the cost of a ton of copper with delivery in three months rose by 0.02% - to 8,376.5 dollars, aluminum - declined by 0.71% to $2,435, zinc - went down by 0.64% to $3,111.5.