One of the world’s luckiest investments is widely considered to be Warren Buffett’s investment in American Express in 1964.

One of the world's luckiest investments is widely considered to be Warren Buffett's investment in American Express in 1964. At the time, American Express was struggling, having lost a significant portion of its business due to the introduction of new credit cards by Bank of America and other competitors. The company's stock price had plummeted, and many investors were wary of investing in it. Despite these challenges, Buffett saw an opportunity in American Express. He believed that the company's brand and reputation would ultimately prove to be strong assets, and he also saw the potential for growth in its travel-related services business. So, in 1964, Buffett invested $13 million in American Express, buying approximately 5% of the company's outstanding shares. Within just a few years, Buffett's investment had paid off handsomely. American Express's fortunes began to turn around, and its stock price soared. By 1978, Buffett's investment had grown to be worth more than $1 billion, a remarkable return on his initial investment