By setting up Berkshire Hathaway, Warren has done everything very rationally.

Don't buy on tips or for a quick move.

Managements, you know, often think of themselves.

Be sure that debt does not exceed 100% of the equity.

Basically, we try to buy value expressed in the differential between its price and what we think its worth.

You have to be a little aware of the emotions of the people who have invested with you.

I tried to follow Ben Graham's ideas.