Buffett's lament: The investing mega-billionaire says he sold Apple stock too soon

Nati Harnik/AP

• Warren Buffett told CNBC that Berkshire Hathaway started selling its Apple stake "too soon."
• "But, I bought it even sooner," Buffett said in his first interview since retiring as CEO.
• Berkshire has made more than $100 billion pre-tax from Apple stock.

Investing legend Warren Buffett wants to come clean: He started trimming Berkshire Hathaway's Apple stake too early, a call that cost the firm billions in stock upside.

"I sold it too soon,"...