Threats of tariffs on Mexican imports were a major buzzkill for the company that brews Corona.

Shares of Constellation Brands — which also brews Negra Modelo and Pacifico — tumbled 5.8 percent, to $176.45, on Friday as investors worried that the company will be forced to absorb any escalating tariff costs, for fear of giving customers an excuse to switch to domestic brews.

“We would not expect Constellation to pass through the tariff with price [increases] as it would widen price gaps versus domestic beers,” Jefferies analyst Kevin Grundy said in a note Friday.

Roughly 80 percent of Constellation’s beer profits come from Mexican imports, he added. Constellation also makes Mondavi wines in California’s Napa Valley. Reps from Constellation did not respond to requests for comment.

The tariffs likewise threaten makers of tequila and mezcal, but US whiskey-makers are worried, too. Jack Daniel’s maker Brown-Forman warned that retaliatory tariffs on its booze could hit its results by $125 million this year.