He's a long term investor in the market and knows the stocks that are good buys with up potential and decent dividends. Today's Up action and Up grades on VZ must have put VZ on his computer screen. Looks like Wall Street and Retail investors like VZ. DD.
The talking heads said that the VZ 4.2% yield is better than a 10 yr treasury with more upside potential. That is probabaly why WB likes it so much. He buys now getting a 4.2% yield, the company pays off it debt in 2 years and where would the Free Cash flow go? Chances are increased dividend potential.