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A detailed discussion of P/E ratios and opinion of different experts on why the U.S. stock market may be overpriced in 2012. The divergence between P/E ratios in Europe and the U.S. is of special concern. P/E ratios for 10 years in Germany and France are at 12, compared to 22 for the U.S. The gap between U.S. and German and French valuations is about 10%, compared to a 120 year average of 1.7 percentage points, says the chief investment officer of Citi Private Bank in London. Safety is one factor, but the divergence is too wide to be accounted for by safety alone.

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Mims raises questions about how productive current investments in Silicon Valley are in tackling real problems we face. He points out that advertising represents about $100 billion in an economy of $16 trillion, yet most startups focus on advertising revenues. Is $1.2 billion invested in Uber ride sharing service too much when other startups tackling bigger problems could be funded with some of that money, is a question raised by some in Silicon Valley.

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Nokia is initiating a search for a new CEO to replace Mr Kallasvuo who became CEO in 2006. Since then Apple's iPhone has changed the market and Nokia has not been able to match the trend set by iPhones in the mobile phone device market. Nokia's stock has fallen 42% since April 19, 2010. Nokia's response to the iPhone was to replace its mobile phone executive and to create a separate operation for smartphones. Nokia plans to have a new line of smartphones in 2010 to compete with the iPhone. The main problem is its operating system software which needs to be more sophisticated. Nokia holds about 40% of the cell phone market with Europe and countries like India being its strong points. But Nokia's margins in India are low because of intense competition. Apple has already surpassed Nokia in the profit in phones, making $1.6 billion in profit in the third quarter of 2009 compared to Nokia's $1.1 billion.

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The different strategies of Apple and Samsung in getting to the point where the two companies now dominate the smartphone market. Whereas Apple makes only one phone, its iPhone, Samsung's strategy is to have multiple phones in each price segment. It has five levels of Android based phones, with 2-3 models in each price segment. Samsung also benefits from doing its own maufacturing. When faced with a number of technologies Samsung's strategy is to bet on all of the technologies until one of them emerges as a winner, and then concentrate resources on that technology. It uses a similiar strategy for televisions. Apple by contrast places more emphasis on original design and profit margins over sales, gaining sales without eroding margins by being the first innovator in the market. It also has its own unique arrangement for manufacturing at lowcost with Foxconn in China that supports its high margins. Apple is secretive about its designs and promotes its brand heavily with its own retail stores. Apple also uses its innovative edge as leverage to steer profits away from carriers. Analyst estimates are that carriers such as AT&T and Verizon pay about $400 per iPhone to subsidize its cost because this is the only way to get customers into their retail stores. IDC estimates are that the smartphone market is $219 billon in 2012. Both companies are very close in volume- IDC estimates Apple shipped 93.2 million smartphones in 2011, compared to Samsung's 94 million units. Apple has market share of 23.5% in the fourth quarter 2012, up from 16% in 2010. Samsung has 22.8%, up from 9.4% in 2010. Apple and Samsung have together taken 91% of operating profits of all cellphone companies in the fourth quarter, an increase of 30% from 2011, according to Strategy Analytics....

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Yahoo CEO Marissa Mayer launched a series of acquisitions after becoming CEO in 2012. Tumblr was acquired for $1 billion. Yahoo has disclosed in a regulatory filing that it plans to write down the entire value of that acquisition. A number of other acquisitions have also failed to deliver value as Yahoo struggles in ad revenues- mobile ad revenues for Yahoo in the 1st quarter of 2016 were $250 million compared to $4.5 billion or 17 times that for Facebook. Yahoo has 200 million visitors each month, but its display ads are not strong on mobile and its mobile apps have not done well with users. As advertising shifted to mobile Yahoo stumbled badly. The failed acquisitions investment could have been better utilized in retaining talented mobile engineers, but Yahoo's CEO resorted to cost cutting when the strategy of looking at consumer trends for news content through digital magazine investments failed. As a result Yahoo suffered from slumping morale and a brain drain.

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Fred Brooks, IBM executive who led the development team for the IBM System/360 mainframe, is the author of Design of Design and of an earlier book Mythical Man-Month that sold 500,000 copies. His unique insights into completing large development projects have helped many tech companies. Brook's law from Mythical Man-Month is that it is futile to simply add engineers to projects in the hope of getting things done faster, as there are a lot of other factors to consider. This is stated by programmers as: "Adding manpower to a project only makes it later." The original design team has to bring newcomers up to speed, and the added distraction is one of the many factors that slow down the project. Brooks offers many new insights in the book Design for Design. One is that constraints are friends which help shrink the designer's search space. Another is that Design is a lot more about art as it is about science. Simply improving the process does not get you great design, it gets you from bad to average....

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The U.S. Dow Jones Industrial Average passes 15,000 in May 2013. The DJIA average has increased by 130% after reaching a low in March 2009. The DJIA peaked at 14000 in July 2007 before falling 54% and recovering to the 14000 level in Feb 2013.

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ZTE of Shenzen, China has 3% global market share and has a new model the F230 which can show streaming video at broadband internet speeds. ZTE will double its cellphone sales to 60 million this year. In the mobile phone business things can change very quickly. The market for mobile phones can change very quickly, is defined by a younger demographic that loves to try new things, and where new technologies and capabilities get incorporated very quickly and in new combinations, navigation, video, broadband, different market segments from the lower end to the upper end especially in developing countries of Brazil, India and China, and the constant competitive churn that brings in new technologies and new companies like ZTE into the market. Upper management at Nokia realizes this as Motorola twice came up with hit models the Star-Tac and the Razr in 1996 and 2005, and each time falling behind after the one time hit. Motorola is even looking at exiting this market. New competitors are in the field with Apple's I-phone in 2007 and with Google and Microsoft developing new software for this market. It requires not just a product hit but a management team and a structure for manufacturing and distribution that is strong and resilient enough to respond to the changing market and to anticipate market trends that are just taking shape and to have the cultural mindset in management at upper and middle levels to deal with huge fast growing markets like India and China, and also Brazil, Russia and other developing countries in Asia and Latin America and Africa where the nature of the demand is different and varies among the different regions also. Nokia has come closest to putting this capability together. It has market share of 40% in this global market with sles in India of 8 million phones a month. There is room for competiton as competitors like Samsung sell about 200 million cellphones a month and are growing at 25% a year. Nokia is also taking a new approach to stay ahead. Its buying smaller companies and developing in-house technology to build its own mobile services business named Ovi. It acquired a number of software companies, acquiring Navteq for $8.1 billion for software on satellite location services. It has its own web portal and and lets wireless providers like Vodafone and Verizon offer their subscribers the option of using portals of Vodafone, Verizon or Nokia's....

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Toutiao and the growing mobile segment for news aggregated from thousands of sources for tech, politics, and other local news. Toutiao and Tencent QQ are taking advantage of the growing need for news in China. Toutiao's algorithm targets new internet users in rural areas and small towns who are looking for news and do not need the use of global news sites as is done by Google and Apple. The deep learning of computers is used to study user habits such as learning about the main soccer teams, watching funny videos,as habits of users. Beijing Bytedance Technology has come up with the new site. The highest growth rate is now for news on mobile, growth is 73% year over year far surpassing travel and mobile video, according to QuestMobile.

China restricts use of Google and Facebook News and other sites and favors local content and news sites to give international news, and news about China.

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Stress-testing a portfolio and diversification, by Jonathan Burton, the Money and Investing Editor at Market Watch in San Francisco.

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Malone describes the future of Silicon Valley and a return to its roots in a world of new devices closer to where Dave Packard and Noyce (followed by Jobs) started the first tech developments in California. He sees a larger Silicon Valley spread out over a much larger region by 2050.

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Because technology spending has been more disciplined and focused on productivity and efficiency gains, the investment has been lower but more effective than in the 3 years leading to the last recession in 2001. At that time it was increasing 12.9% a year leading into the recesson and faced sharp cutbacks leading to a drop of 11% over the next 2 years 2001-2003. By contrast this time the tech spending went up by about 2.8% a year in the last 3 years, according to Gartner, and has delivered solid results at places like American Airlines. Technology spending is likely to hold up and continue moderate increase this year and next as the US enters a recession. At American a fuel efficiency drive starting 2005 including software to come up with best routes, flight paths and baggage loading has saved 96 million gallons a year. Note that spending on computer hardware and software is about half of all capital spending by business.