巴菲特股市投资组合2018年二季度的学习思考

Their largest three holdings are at ~47% of the entire portfolio.

Stake Increases:

Apple Inc. (AAPL): AAPL is currently the largest 13F portfolio stake at ~24% and Berkshire’s ownership is at ~5% of the business. It was established in Q1 2016 at prices between $93 and $110 and increased by ~55% the following quarter at prices between $90 and $112. Q4 2016 saw another ~275% increase at prices between $106 and $118 and that was followed with a stake doubling in January 2017 at prices between $116 and $122. There was another ~23% increase in Q4 2017 at prices between $154 and $176 and that was followed with a ~45% increase last quarter at prices between $155 and $182. The stock currently trades at ~$210. There was a ~5% stake increase this quarter.

Note: As of Q4 2017, Berkshire’s overall cost-basis on Apple was ~$126 per share.
 

 "diversification is protection against ignorance. It makes little sense if you know what you are doing."

巴菲特的投资组合一向使用集中投资原则，