Why did the United States have important trade and investment interests in Cuba before 1898?

Before 1898, the United States held significant trade and investment interests in Cuba primarily due to the island's booming sugarcane industry. By the late 19th century, the Cuban sugar sector had become the most mechanized in the world, utilizing steam-powered mills and railroads to dominate the global market.1

The economic relationship was deeply integrated:
* Trade Volume: Annual trade between Cuba and the United States reached approximately $100 million by the late 1800s.2
* Market Dominance: The United States was the primary destination for Cuban goods, purchasing 87 percent of the island's exports.3
* Investment: American capital was heavily invested in the sugar industry, which accounted for four-fifths of all Cuban exports by 1850.1

This strong economic interdependence, combined with the proximity of the island to the U.S. coast, fueled American interest in Cuba's political stability. When Spain canceled a trade pact in 1894 and the subsequent war for independence disrupted commercial activity, the protection of these substantial economic interests became a significant factor in the geopolitical tensions that eventually led to the Spanish-American War.2