At the height of the dotcom boom, every gym TV seemed to be tuned to CNBC, a financial channel; exercisers did not want to miss out on the latest stock tips as they pounded the treadmill.

After being issued, this package immediately became the focus of the worldwide attention, and directly drove up the global stock markets.

Asked about the stock market on CNBC last week, Buffett said: "Stocks are not cheap."