The USDA only minimally trimmed its US end-of-season stocks outlook and raised its export forecast by less than many traders had anticipated following record-large sales to China.
Equities and oil prices fell and the dollar strengthened as countries including France, Germany, Italy, the Netherlands, Switzerland, Israel and Canada closed travel links with Britain.
Benchmark copper on the London Metal Exchange (LME) was down 1.4% at $7,871 a tonne.