MGM Resorts International (MGM) saw its stock plummet by 6.15% in pre-market trading on Thursday, as casino operators faced a broad selloff following a U.S. tariff announcement. The decline in MGM's share price outpaced the initial estimates, which had projected a 5% drop.

The selloff wasn't limited to MGM Resorts, as other major players in the casino industry also experienced significant declines. Las Vegas Sands fell 4.5%, Caesars Entertainment dropped 5%, Wynn Resorts declined 3.7%, and the U.S. listing of Melco Resorts saw a 3.2% decrease. This sector-wide downturn suggests that investors are concerned about the potential impact of new tariffs on casino operators with international exposure, particularly those with operations in China.

While specific details of the U.S. tariff announcement were not provided, it's clear that the market perceives this development as a significant threat to the casino industry. Companies like MGM Resorts, which have substantial investments in Macau and other international markets, may be particularly vulnerable to escalating trade tensions between the United States and China. Investors will likely be closely monitoring further developments and assessing the potential long-term implications for MGM Resorts and its peers in the coming days.