BRK.B is not a bond; it's Berkshire's class B stock. BRK.A is class A.
read the 2014 annual report. You'll learn about the company and perhaps be able to decide whether or not it's worthy of a purchase/
What happened to your prediction of FB going to $100 without any pullbacks? It didn't even hit $90.
you're being greedy, so I should be fearful
but there likely will be profit taking soon