Warren Buffett's eye for quality stocks like Apple and Coca-Cola is key to his success, elite investor Jeremy Grantham says

• Warren Buffett's taste for quality has been key to his investing success, Jeremy Grantham says.
• Buffett has made a fortune on stocks like Apple and Coca-Cola, which Grantham touted as exceptional.
• Grantham disagreed with Buffett over the virtues of stock buybacks earlier this year.

Warren Buffett's eye for high-quality stocks like Apple and Coca-Cola has been a major driver of his incredible success, Jeremy Grantham says.