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20190220【充实计划】第986期   [推广有奖]

71
充实每一天 发表于 2019-2-20 12:33:13 来自手机
最早提出「云计算」的谷歌,却成了这场竞赛的追赶者

https://mp.weixin.qq.com/s/3d4uL97l95yv6SfALteKHA

72
edmcheng 发表于 2019-2-20 12:40:19
昨日阅读1小时。 总阅读时间123小时
The business of value investing – Six essential elements to buying companies like Warren Buffett- Charlie Tian 2009
https://bbs.pinggu.org/thread-695143-1-1.html (Page 78-82)
Price paid determine value received  
阅读到的有价值的内容段落摘录
Before investing, it is vital to understand the function the markets play. Stock markets are important only because they allow you to buy and sell ownership interests in businesses. Everything else is just noise. I like to say that the best investors are pretend investors: those who can pretend that the stock market does not exist. One of the best advantages of a stock market, liquidity, also happens to be one of the worst. Being able to buy and sell stock at the click of a mouse causes most investors more harm than good. Of course, if you find yourself in a financial bind and need access to capital, the liquidity of the stock market helps you, but I assume that you are investing capital that will not be needed for meaningful periods of time. In this case, the liquidity of the stock market is not as beneficial as you might think. Paying constant attention to the daily fluctuation in stock prices can influence you to make very poor investment decisions. As an investor, your goal is to let the market give you the opportunity to buy and sell at attractive prices, not instruct you on when to buy and sell. It is not uncommon for two investors investing in the same security to have materially different investment results, even to the extreme where one result is gain and the other is a loss. The reason is due to the price paid for the investment. Value investors approach the market as a proxy for determining whether security prices are undervalued, fairly valued, or overvalued. They don’t allow the market to formulate their investment decisions. This distinction between guidance and instruction is very subtle and often is blurred, especially when the market is experiencing periods of wide price fluctuations, or volatility.
It’s obvious that this individual was being influenced by the rapid decline in the stock price although the business was doing just fi ne. He let the market volatility instruct him and make him feel that he had made a mistake. Make no mistake, it’s not easy to watch your investment decline by 20 percent in a week or two and not feel like you have made a dumb move. Between September 15 and 19, 2008, the Dow Jones experienced one of the most volatile trading weeks in history. The mess created by the excessive and irresponsible mortgage and securitization practices came very close to creating a financial catastrophe. Whether you agree with the government bailout or not, without it, the market contagion that would have resulted would have made the 1987 stock market look like a dress rehearsal. On September 15, the Dow dropped over 500 points, or 4.4 percent, on news that insurance titan AIG was facing collapse. On Wednesday, the Dow declined another 450 points, or 4.1 percent. The fi nal two days of the week, the Dow gained nearly 800 points, or 8 percent, to leave the stock market average basically unchanged over the week. Had you let the price volatility instruct your decisions, you were selling during the drops out of fear and buying again at the end of the week when the mood became more optimistic. Without even realizing it, you were selling low and buying high. In fact, most equity portfolios were worth more at the end of the week as the two - day surge in the market recaptured the declines earlier in the week and then some. Investors would benefit remendously if they would remember to echo the sentiments of Bill Ruane and Richard Cuniff during moments of great market turmoil. Before succumbing to your emotions and rushing to sell at moments of pessimism (or buying at moments of jubilant optimism), step back and ask yourself whether the movement in the stock price reflects the intrinsic or true value of the business. Absent some discovery of fraud or any other illegal activity, a quick decline in stock price should not persuade you to head for the exit. Instead, you need to look at the business. If your fundamental thesis remains intact, then do nothing or buy more of a good thing for less.
Value investors often are credited with espousing the buy and hold approach to investing. Warren Buffett is famous for saying “My holding period is forever”, a buy and hold technique enables the greatest attribute of investing to play out: compounding. If you are constantly buying and selling stocks, the frictional costs — commissions, taxes, fees — will eat into your profits. Nothing is more valuable or sought after than a wonderful business that can deliver returns year in and year out. These investments allow you to sit back and enjoy the ride. However, the concept of buy and hold is not without its caveats. The most crucial one is the starting point of the buy process. Whenever you hear any serious investor advocate the concept of buy and hold, take the phrase a step further to mean buy at the right price and then hold. In value investing, the stock price is of extreme importance when entering and exiting an investment. When prices indicate that a good business is cheap, use it to your advantage to make a good investment. Conversely, when prices indicate that business values have exceeded intrinsic value, use the opportunity to sell the overvalued business and once again buy an undervalued business. At any other time, the stock price fluctuation is a distraction. To appreciate the significance of why valuation matters in choosing the right point to buy or sell, consider the 17 - year period from 1964 to 1981. Had you bought the stocks in the Dow Jones Industrial Average at the beginning of 1965 and held until 1981, your returns would have been non-existent.

阅读到的有价值信息的自我思考点评感想
During those 17 years, the Dow Jones started and ended at the same point. At the beginning of 1965, the Dow stood at about 875 points. Seventeen years later, the Dow was at 875. A buy and hold approach over that period would have effectively delivered a zero percent return – a negative return when you factor in decline in purchasing power over that period. Seventeen years is a significant amount of time. For many investors, it represents the bulk of their investment years and is certainly a long enough buy and hold period. Interestingly, the period from 1982 to 1999 turned into one of the greatest market periods in American history. The Dow Jones advanced more than tenfold, and a $ 100,000 investment in 1982 would have made you more than $ 1 million by the end of 1999. The starting point matters. While you can never expect to buy at the exact bottom (say, in 1982) and sell at the peak (as in 1999), you can avoid doing the exact opposite, which is what many investors did by buying in the late 1990s at inflated prices. Excited by the quick and unsustainable rise in stock prices fuelled by the Internet boom, investing turned into speculating motivated by greed rather than common sense business principles. A very good rule of thumb and decades of data suggest that the best starting points occur when the price to earnings (P/E) ratios are lower rather than higher. The P/E ratio is simply the share price of stock divided by the per - share earnings of a business. It represents how much investors are willing to pay for the future earnings of a business based on future business expectations. If a company’s shares trade at $20 and its earnings per share for the year are $2, then the P/E ratio is 10 (20/2). The inverse of the P/E ratio is known as the earnings yield or the percentage of earnings per share. As the lower the P/E ratio, the higher the earnings yield. Interestingly, you don’t need decades of data to tell you that it is more prudent (and more likely profitable) to look for quality businesses that are trading at lower P/Es. Anyone would rather pay $1 million for a business that earns $200,000 in profits versus one that earns $ 100,000, all else being equal. Similarly, the odds of favourable market returns increase when the general market has a lower P/E ratio. In business, you make money when you buy an asset, not when you sell it. By that I mean that if you buy low, odds are very strong that you will make money when it is time to sell. Occasionally there are periods when logic and discipline don’t matter, and you can buy at any price and sell at a better price. The Internet boom of the late 1990s and the housing bubble that started earlier this century are two examples that come to mind. But blindly participating in periods of excessive speculation ultimately ends up doing more harm than good to most participants. Employing a sound philosophy with regard to stock investing demands that you consider the price paid. In order to buy intelligently, you must know how to assess the value of the business. Investors need to recognize another important part of buying securities that has more to do with temperament than valuation. Recognize that very rarely will you make your purchase decisions at the very bottom. A true value - oriented investor doesn’t try to time markets but instead focuses on pricing stocks and buy it at the right time. It may not be the lowest but it is still under value or have room for price growth. As such, you will rarely ever buy at the absolute bottom or even sell at the absolute top. If you are fortunate to buy at the bottom and sell at the absolute top, understand that doing so involves a big dose of lucky timing. Prudent investors who devote serious time and effort to understanding and valuing a business will be able to buy at an undervalued price and sell at a higher price. A business-like investment approach characterized by a quantitative analysis of each individual company will significantly increase the probability that you buy at a low price and are thus able to sell later at a higher price. Investors must learn to be at peace with their investment decisions. You can do this only if you have truly focused on paying cheap prices for your investments.
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73
充实每一天 发表于 2019-2-20 12:44:14 来自手机
抖音也能「跳一跳」

https://mp.weixin.qq.com/s/e1RUTTPX8i1lqdfWt6idtw
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74
obaby85 在职认证  发表于 2019-2-20 12:44:23
2月第20天
昨日阅读3小时,累计阅读888小时

1.今天你阅读到的有价值的全文内容链接
推荐:《魔力法则:用一年时间积累一生财富》
(套装共3册)拿破仑·希尔 (作者)
《思考致富:获取财富的13条白金法则》
《致富秘诀:打开财富之门的12把钥匙》
《成功魔梯:令财富进阶的17条魔力法则》
题目的标题党的嫌疑,内容肯定是经典!
https://bbs.pinggu.org/thread-6930167-1-1.html


2.今天你阅读到的有价值的内容段落摘录

今天继续读:《宽客人生:从物理学家到数量金融大师》
第14章  暗中笑者(下续二)
    马克的主题演讲过于注重论证,学术性较强,而且还阐述了这个问题的历史演变。他对这个逆散射问题的最初解法是,重点考虑将某一到期时间的所有市场隐含波动率进行匹配,因此忽略了暗含在隐含波动率曲面上的其他附加信息。
       布鲁诺在国际金融工程师协会会议上的演讲则最折磨人。由于是个法国人,他偏好使用规范的数学方法。他那非常简短的报告提出了一个优雅的公式,公式根据相同执行价格和到期时间的隐含波动率曲面上的斜率和曲率来求得局部波动率。他的论文并不容易理解,而且我了解到的人里面也没人可以肯定他的结论就是正确的。有时,我想他是故意弄得晦涩难懂,没有给出明确的公式推导过程,而直接给出标新立异的结论。
       我们研究了布鲁诺的报告,很快意识到他那简明的公式完全等同于伊拉杰和我在离散树形图上所开发出来的结果。只不过在他使用微积分的地方,我们使用的是代数。尽管重要性或伟大程度上不能相提并论,但我们的角色就像是费曼之于施温格或布莱克和斯科尔斯之于默顿。在我们论文后面的附录中,我们重新推导了布鲁诺的结论,并增加了一个更加容易让人明白的证据,以及对他工作的引用。
      1993年12月末,布鲁诺、伊拉杰和我分别向《风险》杂志的格雷厄姆·库珀提交了各自的论文。布鲁诺的论文刊载在《风险》1994年1月刊上,并被加上了一个编者按,说伊拉杰和我的文章将刊载在随后的2月刊上。1月刊上还有一篇格雷厄姆·库珀写的一页纸长度的新闻报道,评论马克、布鲁诺、伊拉杰和我所做的工作,将其称之为新的“超级模型”,还非常准确地描述了我们各自方法的优缺点。我们都被恰到好处地吹捧了一下。
       在之后的几年里,我们巡回参加各种学术讲座和会议。我在数十家大学的金融系和商学院里、维也纳期权交易所、数不清的业内会议上发表演讲。在日本、法国、瑞士、西班牙和意大利这些国家,交易员更加经验丰富,更喜欢了解量化理论,他们的销售人员带着我去见一拨又一拨的客户。我们在苏黎世和伦敦、毕尔巴鄂和巴黎、米兰和慕尼黑,给大型团体做一整天的学术讲座。这真是令人兴奋!
        伊拉杰和我与在1994年加入我们小组的另外两名前物理学家迈克·卡莫、邹乔一起,继续完善这一模型,并利用它对奇异期权进行估值。我们还与量化策略小组中的两名软件工程师丹尼斯·厄金纳和艾伦·巴科沃特一起,将模型嵌入到交易部门的交易软件中。最重要的是,我们努力将模型的数学特征概括成交易员能够接受的、发自内心的理解。由于他们所有的直觉都是基于布莱克-斯科尔斯模型,于是我们就开发出一系列简单的、近似的修正方法,交易员们可以利用这些来自于实践的规则来对布莱克-斯科尔斯模型稍加改动,就能应用到隐含树形图上了。
       事实证明,向我们的交易员解释模型远比向我们的客户解释模型困难。交易员非常繁忙,他们的生活主要是盯住屏幕,服务销售人员,将他们的交易指令输入计算机系统。每天他们都要做上几百笔或几千笔的新交易,通常要工作到深夜,以保证所有的细节在他们部门的前台风险管理系统和在公司层面保存会计账户和交易记录的后台主机之间完全准确、相互一致。相对于提高定价水平,他们对将自己生活中的记账记录部门进行自动化更感兴趣。
       交易员在模型使用方面是有决定权的,他们可以使用他们想要使用的任何模型,不需要原因或验证。如果你希望他们采用不同的比例对冲,证明的责任就在于你。他们并不愚蠢,只是有点门外汉的感觉,不喜欢使用他们自己不理解的新模型。可不幸的是,他们又不愿意在理解模型方面花时间。当交易员还没有使用模型时,很容易让他们使用最先得到的模型。一旦他们有了所依赖的模型,让他们再接受改进的模型就难了。
……

3.今天你阅读到的有价值信息的自我思考点评感想
    量化交易的全球化过程在这一部分的作者描述中可以窥见一斑:是整个行业的发展所需要的。经济学的规律确实在起作用,需求决定的市场,市场推动研发,这实际上是产学研在实战中的完美表现。当然在法律所监管的范围内才可以如此顺利而为整个行业的发展带来突破性的进展。IT技术、网络技术、心理学发展的最新成果都被自然而然地应用于行业发展的过程中了。虽然学术争论还有,但已经不重要了,重要的是你的研究如何能被大家接受。学术的先进性也已经完全放在了次要的程度,你的成果如何被大家接受,尤其是被交易员接受,并且为公司和交易员带来实际的市场效益,这才是第一位的。这是不必评价和审核的,这些用户的业绩增长才是对你的模型最好的评价和审核!当然与之而来的是金钱上的“巨额”收益,也就是财富的迅速增长:公司的,模型使用者(交易员和客户)的,模型开发者的,模型应用维护者的。这样的受益不靠争执,不靠评审,不靠施舍。这完全是一个非常激动人心的正反馈过程!
       交易员需要什么,需要做,模型开发人员就怎么做,并且做到可以满足交易的潜在需求。想不成功都很难!
       逆散射问题,是个形象的比喻,找相关资料学习学习,看看可不可以构建自己的隐含树形图:需要搞清楚如何构建树形图以及怎样对树形图进行调校以使其适用于标的特有的波动率曲面。能否做到呢?至少作者给出了成功的案例,这是一条可以走通的路,值得去付出努力。
       A股微幅小涨,2千亿的量,算是牛市的底的特征吗?期待中。
……

单词挑战第3月第7天
Implication  隐含;言外之意
The implication that marital infidelity enhances a leader's credibility is preposterous.

1.背单词1个 - O
2.飞鸟式36个 - O
3.Code Practices 0.5 hr - X
4.论坛收集资料30分钟*6 - O
5.Cloud Zhuang45minutes - O
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75
bearli100 发表于 2019-2-20 12:46:12
昨日阅读1小时,累计阅读131小时
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76
充实每一天 发表于 2019-2-20 12:46:37 来自手机
PE接受失败

https://mp.weixin.qq.com/s/8CgUEPhky_nyVk5DFQAtUA

77
充实每一天 发表于 2019-2-20 12:48:07 来自手机
小米管理补课,学着做一家大公司

https://mp.weixin.qq.com/s/zkU9EyTAzvXwrOJMIIKrqQ

78
wimming_lee 发表于 2019-2-20 12:49:06 来自手机
充实每一天 发表于 2019-2-20 05:17
【加入充实计划】【了解充实计划】
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昨日阅读:2h<br>
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昨天读了米什金的货币金融学,之前看到别人的强力推荐值得一读再读,终于在读货币理论内容的时候读到了高潮感,很爽。之前一直在读通俗的读物,近两天开始读枢纽这样专业性强的书,明显有困难感,但是往往只有这些痛感才能更好地提升一个人的能力!
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79
coffeefly 发表于 2019-2-20 13:02:54

昨天阅读1小时,累计阅读23小时
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80
karst 发表于 2019-2-20 13:31:30
昨日阅读1小时,累计阅读130小时。继续阅读《我国生态文明建设的科学基础与路径选择》,关注环境问题,实际上,生态文明建设就是原来的环境保护工作的升级和完善,有人称之为环境保护的升级版或2.0版本。看看人们都很关注的食品安全问题吧,这个问题来自于环境污染以及农药化肥的使用。都知道中国是农药和化肥使用量最大的国家。中科院博导的调查显示,调查区平邑县卞桥镇石桥、南安靖、卞桥、西荆埠、黄埔庄等几个村子的农民开始忙碌起来。农田里爆发了一种钻心虫,专门啃食玉米芯,即顶端的幼叶,吃完后就钻到植株下面的部位,非常难以治理,农民恨之入骨。农民每年都要向地里打多遍农药,加上播种期用农药拌种,使用农药四五次属于正常,如果种植果树,每年打药的次数高达20多次。现在的农田充满了杀机,害虫几乎都是经过农药洗礼的,农药越用越多,而害虫似乎也越战越勇,在过去一百多年的人虫大战中,化学对抗的胜者似乎是害虫而不是人类——医院里癌症病人越来越多,而害虫繁殖速度依然成倍增长。害虫在农药胁迫下,会出现进化,这个进化是在农药诱导下产生的。据说有些害虫泡在农药原液里也毒不死。这类害虫进化出来了一层隔离液态的蜡质毛。如果有人研究农药诱导的害虫进化机理,应当有很好的科学发现。农民不知道其中的原理,每年继续有成吨的农药倾倒在农田里。有些虫害是农药商和农药贩子人为制造出来的恐慌,为了吓唬农民,其目的是兜售其农药,他们不关心农民是否治住了害虫,他们关心的是农药的销售量。当农田出现的害虫的时候,仅仅是每亩出现2~3头害虫的时候,植保专家就建议农民喷洒农药,还推荐他们使用哪一种农药。如果不打,农民们经常听到的是下面的话:你不打农药吗?不打庄稼都毁了。一些ZF官员也成了农药商的传话筒:“不打农药,产量会减少70%,甚至会绝产。”现在农药的名称越来越奇怪,如“一步绝”、“一月无虫”等,既充满了对害虫咬牙切齿的恨,又充满了对农民的诱惑——不怕你不来买。
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