Pakistan, Aug. 8 -- The United States has announced new tariffs on imports of one-kilo gold bars, marking a significant shift in trade policy that could affect the global precious metals market. The decision, outlined in a letter from Customs and Border Protection dated July 31, reclassifies one-kilo and 100-ounce gold bars under a customs code that makes them subject to tariff levels.

Officials believe this measure could directly impact Switzerland, which stands as the world's largest hub for gold refining and export. The reclassification may increase costs for importers and reshape trade flows between major gold markets. Additionally, industry experts warn that the move could create price fluctuations for gold buyers and sellers global...