市场消息：美国最高法院维持对大容量枪支弹匣的禁令。

Group 1 - The U.S. Supreme Court upheld a ban on large-capacity gun magazines, which is a significant legal decision impacting gun control regulations [1] - This ruling may influence the ongoing debates and legislative actions surrounding gun rights and public safety in the United States [1] - The decision reflects the court's stance on the balance between Second Amendment rights and the government's interest in regulating firearms to enhance public safety [1] Group 2 - The ruling could have implications for gun manufacturers and retailers, potentially affecting their sales and market strategies in response to changing regulations [1] - This legal outcome may also lead to increased scrutiny and potential changes in state-level gun laws, impacting the broader firearms industry [1] - The decision is likely to provoke reactions from various advocacy groups, which could further influence public opinion and policy regarding gun control [1]