MGM Resorts International (MGM) saw its stock price plummet by 6.15% in pre-market trading on Thursday, as casino operators faced a broad selloff following a U.S. tariff announcement. The significant drop in MGM's share price reflects growing investor concerns about the potential impact of new tariffs on the gaming industry.

The decline in MGM Resorts' stock is part of a wider trend affecting major players in the casino sector. Las Vegas Sands was down 4.5%, while Caesars Entertainment fell 5% in the same trading session. Other industry peers, including Wynn Resorts and the U.S. listing of Melco Resorts, also experienced notable declines of 3.7% and 3.2% respectively.

While specific details of the U.S. tariff announcement have not been provided, the market reaction suggests that investors are wary of potential negative impacts on the casino industry. These could include increased costs for imported goods and materials used in casino operations, or concerns about reduced international tourism, particularly from China, which is a key market for many U.S. casino operators. As the situation develops, analysts will be closely monitoring how MGM Resorts and other casino companies navigate these potential challenges and their strategies to mitigate any adverse effects on their operations and profitability.