People wearing colored jackets in Chicago were shouting at each other about cheese for the final time on Friday.

A daily 10-minute auction in Chicago that helps set the national price of cheese will go electronic on Monday, after being held in a traditional open-outcry format for decades. CME Group Inc., the exchange operator that oversees the auction, ran it Friday in its old form for the last time.

“We’re all going to miss the yelling and the screaming,” said Dean Kinnas, a dairy options trader at the CME-owned Chicago Board of Trade, or CBOT, exchange.

The “spot call” cheese auction is among the smaller and more obscure markets in CME’s empire. Until Friday, it was held in a corner of the CBOT trading floor in downtown Chicago each weekday at 10:45 a.m. Central time. There are often only a handful of trades—each representing a “carload” of 40,000 to 44,000 pounds of cheddar—executed each day by a small group of dairy brokers.

CME hopes the electronic platform will boost participation, with companies able to access the auction and monitor prices from anywhere in the world.