Gro Intelligence reports that US rail transport of grain has declined since 2008, with only a brief rebound in 2014, even though railroads move hundreds of thousands of carloads of commodities each week. The article is a reprint from Dry Bulk magazine and discusses the structural trend rather than a single new event.
A shift of grain away from rail toward trucks and barges changes regional basis and transport costs, which can widen or narrow the spread between interior and export prices. The effect on prices is gradual.
Not enough comparable past events yet for a historical read.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.