NEW YORK (MarketWatch) -- Benchmark Nymex crude oil CL1Q -1.16% and gold for August delivery GC1Q -1.01% fell Friday as the dollar strengthened against six rival currencies DXY +0.11% . Oil declined 1.2%, or $1.16, to $94.26 a barrel and gold fell 0.9%, or $12.90, to $1489.90 an ounce. Commodities traded in dollars tend to trade inversely to the greenback.