Berkshire Hathaway is arguably always Buffett's favorite stock. But another stock commands a strong second place.

Warren Buffett’s Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) is often considered a reliable stock for conservative long-term investors. The conglomerate is led by Warren Buffett, who famously said his favorite holding period for a stock is "forever.

Nubank, Latin America’s largest fintech bank, has the ability to grow globally. A recent pullback in its parent company’s shares offers an attractive entry point.