Palladium prices topped platinum for the first time since 2001, underscoring the diverging outlooks for the metals. Supplies are expected to tighten in palladium, used mostly in pollution-control devices for gasoline-powered cars and trucks, while demand has slipped for platinum, which helps reduce smog from diesel vehicles. An ounce of platinum bought as little as .9901 ounces of palladium on Wednesday, the least since September 2001.
