Google Finance的可拖动时间范围chart和新闻时间标识让我当初一下子就抛弃旧爱Yahoo Finance哈哈
上星期割掉高盛（GS）,因为盈利效率过低。我一直是相信Google Finance的计算的，以前验证过也没错，但是这次清掉一个股票后发现结果不对了：
Buy: 10 * $210.50 + $29
Buy: 20 * $214.91 + $29
----------------------------
Total cost: $6461.2
Dividend: $10.5
Sell: 30 * $223.15 - $29
-- ...
A recent article from Economist talks about the emerging trend of mutual funds leveraging more and more financial derivatives, just like what hedge funds do, to improve returns. Especially in Europe, due to sort of deregulation on mutual funds, they are allowed to take risky positions for a sm ...
Author: David Harding, Winton Capital Management
The Sharpe ratio is a statistic which aims to sum up the desirability of a risky investment strategy or instrument by dividing the average period return in excess of the risk-free rate by the standard deviation of the return generating process. Devis ...
ETFs are hot these years with increasing public attention over other kinds of fund. However, Exchange-Traded Fund Myths Busted (from morningstar.com) discovers some of the "famous" myths behind the shine of ETF.
ETFs are getting all the fund flows.
ETFs must perform better than mutual fun ...
hurricane1026 写道两位说的都很静僻，尤其是布娃娃，正合我心。
不过就算有因果理论支持，他的试错还是靠概率支持的，他绝对推测不出某次必胜。
索罗斯把事件分为一般事件和历史事件，对一般事件概率是适用的，但对起决定性作用的特定历史事件概率就不行了，因为几乎无法重复这些历史事件，没有历史数据样本何来统计出的概率？
他当然没把握必胜，但不代表他借助于统计概率。比如泰国央行的可能的反应，这只能源于他的主观估计和’情景测试‘，泰国之前又没有类似危机，哪来历史统计概率? 按他的反射定律，即使以前出现过类似事件，那个概率也不见得有用，因为以前事件的结果会’反射‘到人，也就是人会学习吸取以前的教训 ...
hurricane1026 写道
乔治．索罗斯的投资理念不知道各位是否知道，最核心的就是试错．在他的理论中，人的思想就没有对的，或者说没有全部正确的，而且你过去正确也不表示你接下来仍然正确．在他的投资生涯中，基本上就是交了学费就跑．完全靠概率上的胜率来制胜．也就是说他认为很多事没有理由，在胜利之前没有什么可以证明它可以胜利．一切要等真正胜利之后才胜利，而且胜利之后也不能保证它会继续胜利，所有的假设和预测都没有１００％的正确性．
其实对于什么东西会成功这样的复杂事件来说，参与决定的条件太多了．以至于我们根本无法确定其中正向和反向的条件带来的权重．所以凭条件去推理有的时候还不如掷鹘子来的有效吧，大 ...
Peter Lynch says in his One Up on Wall Street
that comanpies with boring names are better for investment. Those with
both boring names and doing boring things are even better, and those
with boring names and doing disgusting things are the best of best,
simply because these are most likely to be und ...
Thanks for the nice introduction
from earlzhang's blog on Research Affiliates Fundamental Index (RAFI).
Basically, it's a new system to determine the weights of portfolios by
looking at fundamental factors of companies, rather than capital sizes
of them. In my comment posted there, I think it makes ...
rtsp://time.dufe.edu.cn/movie/sjdjt24.rm
I happen to find the above inspiring interview with the
aurthor of Rich Dad and Poor Dad, Robert T. Kiyosaki on the Phoenix TV.
Although I've already been quite familar with his thoughts, it will
never be worse to refresh my memory and open my mind again.
I happen to find AMPL, "a computer language for describing production, distribution, blending, scheduling and many other kinds of problems known generally as large-scale optimization or mathematical programming." (from www.ampl.com) Here's an exmaple on the transportation allocation provin ...
After programming intensively for a whole day, I've done the function
to import historical quotes through Yahoo!Finance's csv format
output. Terrrific! Now just forget about those commerical web services
with subscription fees from $$ bucks monthly. Gonna beautify the code a
bit later~
Here is the original script (in Chinese). This nice talk let me review the assumption (failure of EMH) that I use for the anlysis model that I'm currently working with. Now I realize that EMH is half true or half false, which doesn't matter since there's no perfect model that can prove it. Within a ...
Finally I've found a solid introduction on ETF
Although I don't agree that passive managed fund can be better performed than active one, simply because they are not efficient portfolio in theory, ETF is quite popular. I think the key fact is that the ETF's nature of hedging and speculating increase ...
"1994: Long-Term Capital Management is founded by John Meriwether and accepts investments from 80 investors who put up a minimum of $10 million each. The initial equity capitalisation of the firm is $1.3 billion. (The Washington Post, 27 September 1998)
End of 1997: After two years of returns ...
I've touched a little bit of so-called modern portfolio theory. The basic philosophy behind (both single-index model and multi-variable model) is to decompose an extremely unpredictable variable (expected return) to one (beta) or several less unpredictable variables (GDP, interest...,etc.) The previ ...
Finally the google version of Yahoo! finance is coming out. Several noticable features of Google finance includes interactive historical price chart and time-marked news. Hope Google will release sort of APIs like the one of Google Map. On top of Google's information, I have a lot of ideas to test t ...
(I'm too lazy to comment on this article this week.><)There was an insightful article on bloomberg last week, Index Mutual Funds Get an A in School, C- in Life by Chet Currier, which disclosed the myth of passively managed fund these years. Vanguard 500, the biggest index fund with 104.5 billi ...
A recent article on morningstar.com disclosed Buffett's portfolio structure. One thing that contradicts to the public image of him as a value investor is that only small portion of his investments can be classified into value style. According to another research paper, Buffett is "actually a la ...
Just finished reading the set of papers titled Developments in Forecast Combination and Portfolio Choice, since it's due tomorrow. (I'm a bit lazy currently><) Some of points I came to:
The difficulty of calculating downside standard deviation of a portfolio: Hmm...I've never realized such i ...
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Darcs简介
good 3x
-- by 夜鸣猪 -
Pratical Ocaml作者采访
现在主要用F#分析数据，因为比较舒服（人懒啊）。其实也只用到很少的FP特性，Ru ...
-- by cookoo -
Pratical Ocaml作者采访
一年多了，呵呵，cookoo能说说看，学习使用OCaml的进展和体会吗？
-- by billgui -
Memory - 柿岛伸次
还不错啊。
-- by hazzy -
Memory - 柿岛伸次
我很想下这个，可就是不能下。LZ能否提供链接
-- by yeshucheng
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