Exactly - if you look at the numbers, you'll see that BRK.A is a very low-volume stock (today's volume was 1,700, which is quite high for that stock). It's also

Exactly - if you look at the numbers, you'll see that BRK.A is a very low-volume stock (today's volume was 1,700, which is quite high for that stock). It's also got only 1.5M shares outstanding, in comparison to (for example) IBM's 1.3B.