CIF bids and offers from broker wires.
Data: silver/srw_cif.parquet,
silver/corn_cif.parquet,
silver/soybean_cif.parquet,
silver/soybean_meal_cif.parquet,
gold/river_barge_freight_history.parquet
Monthly freight line: Peoria's published tariff base using the Illinois Ceres bid/offer midpoint, matched by delivery month. Corn delivery equivalent adds Peoria's 8.75 c/bu delivery differential and 6.00 c/bu load-out charge.