Businesses oppose any change in hong kong`s recognition as a sufficiently self-sufficient city, where large U.S. companies have access to China and Southeast Asia, and where bilateral trade is flourishing in different parts of the economy, from wine to financial services. “If there`s a new trade regime, it changes the math for businesses,” said Dr. Tim Summers, a senior fellow at Hong Kong-based Chatham House. The U.S. trade surplus with Hong Kong is the largest with a U.S. trading partner, with a surplus of $31 billion in 2018, mainly due to Hong Kong imports of U.S. aircraft and space vehicles, electrical machinery, pearls, gold, diamonds, artwork, meat, fruit and nuts. U.S. services exports to Hong Kong reached $12.8 billion in 2018. In addition, the United States remains one of the main sources of foreign direct investment in Hong Kong.