Billionaire Warren Buffett is viewed as one of the world's greatest investors, so his annual letters to Berkshire Hathaway shareholders are always read closely for lessons. Buffett no longer ventures much into politics or current events in his letters,

Billionaire Warren Buffett, marking 60 years leading Berkshire Hathaway, told shareholders in his annual letter released Saturday that he continues to prefer stocks despite a higher cash position.

Warren Buffett turned a $40 billion Apple investment into $150+ billion, marking his most profitable investment ever. Learn the key principles behind this success and how they apply to all investors,