Most base metals fell in thin holiday trade on Wednesday, as a firmer dollar made greenback-priced commodities more expensive for buyers holding other currencies.
Three-month copper on the London Metal Exchange (LME) fell 0.9 percent to $9,901.50 per metric ton and aluminum eased 0.3 percent to $2,584 a ton.
LME lead slid 0.3 percent to $2,209.50, nickel shed 0.3 percent to $19,175, while tin rose 0.2 percent to $31,270 a ton.
Several Asian markets, including top metals consumer China, were closed for the Labor Day holiday.
The US dollar was stronger ahead of a Federal Reserve policy decision where the central bank is expected to keep its interest rates unchanged amid sticky inflation.
Lower interest rates could mean a softer dollar and faster economic growth, both of which are supportive to metals prices.
Expectations of interest rate cuts have changed drastically after the US economy posted robust performance, Sucden Financial analyst Daria Efanova said in a note.
