Mexico is the largest US popcorn market and accounts for almost a third of all exports.
The head of Mexico’s largest cinema chain has said the impending renegotiation of the North American Free Trade Agreement (Nafta) means the US popcorn industry is at risk.
The biggest consumer of popcorn remains the US, where an estimated 28bn quarts are consumed annually.
The company spends $40m a year on US goods, including screens, projectors and $6.5m of cheese from Wisconsin, which is melted over nachos.