置顶的贴子中有牛经沧海的巴菲特持仓简况2017Q3
牛经沧海
11/15/2017
截至9/30/2017 (最新报告数据),巴菲特持仓45支股票,其中前4仓位占50%,前10占80%,前20占93%,前30占98%。可见轻重缓急区分明显,纲举目张。
老巴的投资组合是170B的规模,但是前4仓位占50%,可以说老巴投资组合的四大金刚的表现,基本就决定了投资组合的整体表现。所以前4-6个仓位是老巴的投资组合的决定性的投资选择,其它的都是无关紧要,可以忽略不计的。
“Diversification is protection against ignorance. It makes little sense if you know what you are doing.”
And in 1998, Buffett said:
“I can guarantee that going into the seventh one instead of putting more money into your first one is…a terrible mistake. Very few people have gotten rich on their seventh best idea. So I would say for anyone working with normal capital who really knows the businesses they have gone into, six is plenty, and…probably have half…(in) what I like best."
按照凯利公式,应该尽可能的将多的资金投入到最好的投资机会中去。这是最佳的博弈模式。
最佳的模式,不是完美的模式。
Warren Buffett, chairman and chief executive officer of Berkshire Hathaway, summed up this attribute well: ‘Take the probability of loss times the amount of possible loss from the probability of gain times the amount of possible gain. That is what we’re trying to do. It’s imperfect, but that’s what it’s all about.’”
老巴的IBM的投资是失败的,然后Apple上的获利大大超过IBM上的损失。
在英镑交易中, 老索不是心血来潮要给大家露一手绝活,遵循最佳的博弈模式是他的一贯做法。
补充一点:在英镑交易之前,斯坦利已经取得了大约20%的YTD投资回报,斯坦利是以这个20%的YTD获利为交易的防守底线。
对于我们普通投资者而言, 理解凯利公式的博弈原理,可以更深刻的理解资金安排的重要作用。