I watch a lot of news cnbc bbc ..... when ever warren buffet talks about the economy people listen. would be possible that he would buy a type of stock eg: exxonmob then have an interview on tv and say i am confident the company will make a lot of money this winter. Then when the demand for the stock rises with the value of the stock without the company actually doing better. then just before the bubble bursts mr buffet sells all of his stocks making lots of money by buying low and selling high.