[Mike in Ohio]

Egg futures contracts used to be traded on the Chicago Mercantile Exchange (I was a "runner" there a long time ago when it was live trading). I'm not sure where they are traded now electronically but this is one way prices are set by (large) buyers and sellers in the market place. Locally, prices are set/determined at the weekly auction. They auction produce and eggs in the morning before cattle and hay are auctioned.