Berkshire Hathaway is undervalued by 17%
Berkshire owns Burlington Northern Santa Fe, the nation's largest railroad.
BNSF will be a major driver of earnings.
The stock should rise to $251 by 2020.
I think Berkshire Hathaway's Class B stock (BRK.B) is undervalued and has the potential to rise 17% to $251 by 2020.