(Bloomberg) — Drought has made the Panama Canal a chokepoint for the flow of the world’s most important commodities. Oil’s rally has fizzled, with some citing better-than-expected oil supplies. The corn harvest in the US, the world’s top grower, is set to break a record. Coal output by the world’s top greenhouse gas polluters takes an interesting turn. And palladium has tumbled to the lowest price in more than five years.