The euro’s weakness saw the US dollar rise on Friday and last week, knocking oil prices lower and weakening other commodities.
The euro dived as low as $US1.3503 on Friday, down from $US1.3603 in late New York trading on Thursday.
It lost 1.2% against the greenback over the week.
Oil prices fell with New York West Texas Intermediate’s April contract shedding $US1.52 to $US80.68 a barrel after dropping briefly under the $US80 level during trading.
It was down 0.58c over the week.
London’s Brent North Sea crude for May delivery dropped $US1.60 to $US79.88.
The OPEC oil cartel’s decision to leave production levels unchanged was overshadowed by the weakness in the euro and the worries about Greece.
OPEC left its output ceiling unchanged at 24.84 million barrels a day at a meeting on Wednesday, citing uncertainty in the economic environment and weak global oil demand.
Gold also fell, cutting its best week in a month.
The stronger US dollar eroded gold’s strength during the day.
Gold took a harder fall than other metals, however.
Comex April delivery prices dropped $US19.90, or 1.8%, Friday night, our time, to end at $US1,107.60 an ounce.
It cut the week’s advance to just half a per cent.
Among other metals, Comex silver for May delivery fell 39c to $US17.03 an ounce.
Copper for May delivery was down 2.5c at $US3.37 a pound in New York.
On the London Metal Exchange copper ended at $US7,435 a tonne down from $7,486 at the close on Thursday.
Cooper prices are up around 20% this year off the back of the better outlook in the US and an underpinning of demand from China.
Inventories are down 30,000 tonnes since the start of this month.
LME three-month nickel hit $US22,900 a tonne, the highest since March 4. It ended at $US22,450 a tonne, up from $US22,760 on Thursday.
Three month LME zinc ended at $US2,295 a tonne down from Thursday’s close of $US2,333. Lead fell to $US2,200 a tonne from $US2,245, aluminium eased to $US2,258 a tonne from $US2,276.
London analysts say a nickel shortfall could be emerging later in the year.
If so, that would be the first for four years as steel demand revives, especially for stainless steel in Europe and the US.
