Jammin Jars

About Jammin Jars

The two companies began collaborating in November 2025. As part of the deal, Polymarket provided data for a dedicated prediction market section on Yahoo Finance. The feature provided market-based probabilities of economic, political, and financial developments alongside Yahoo Finance content. 

The Yahoo Finance prediction market section was taken out in April. The companies have now confirmed that the larger deal is also off, as reported by Bloomberg. 

Yahoo said Polymarket is still an advertising partner and suggested the two could collaborate on other projects in the future. Polymarket has not provided any public explanation for the end of the data partnership. 

What is Jammin Jars?

“Tax collection is part of the economic game and all sectors contribute,” Durigan said. “The same happens with betting.”

He argued the sector should be treated with the same rigour currently applied to cigarettes.

In an interview with Guilherme Amado’s column in Amado Mundo, Durigan said the government of Brazil and President Luiz Inácio Lula da Silva had fulfilled what was defined in the law that established sports betting.

How to play Jammin Jars

In January, Polymarket and Dow Jones announced an agreement that paved the way for event contract data to appear on various Dow Jones sites, including The Wall Street Journal. Dow Jones also owns Barron’s, Investor’s Business Daily and MarketWatch, among other media properties.

Polymarket also has marketing deals with Major League Baseball (MLB), Major League Soccer (MLS), the NHL and UFC.

While the Polymarket/Yahoo Finance situation is one of the earliest examples of a severed relationship between a prediction market operator and a media entity, that doesn’t mean those “divorces” will permeate the two industries.