Why did Warren Buffett never sell his education shares?

When it comes to investment, no one can shy away from Warren Buffett, who started from 100 dollars and invested in more than $40 billion trillion in assets, known as the "stock market", and Buffett's options represent the basic orientation of capital markets for a particular industry or company. The web has collated the holdings and past investment records of Buffett's Berkshire Hathaway investment Group, Buffett, who has always favoured consumer companies, has never favoured an education or training company-a sector that accounts for a higher proportion of consumer spending in any country, or "just needed", and why Buffett never moves? When asked by shareholders why he bought Scotterfezer, Buffett used the most refined language to explain his stock index: easy to understand, big enough, well managed, very profitable, high ROI. In addition, we have to add one more, can "forever" hold, is called "Value investment". Take this a few more than the education and training companies at home and abroad, it is easy to draw the reasons Buffett did not sell: The agency's model is simple, but not big enough--Buffett's stock pool is basically Nestle, Johnson, Procter and Gamble, such as hundreds of billions of dollars of companies, a small number of Goldman Sachs, ConocoPhillips and other companies more than 50 billion dollars, very few such as The Knight newspaper and other media, belong to the personal interest of Buffett. Education and training companies at home and abroad, the current listing, the new Dongfang value of about 3 billion U.S. dollars, the U.S. stock in a slightly larger number of Apollo and DeVry, are around 2 billion U.S. dollars, far from the Buffett's stock selection standards. High market capitalisation is just a symptom, and Buffett wants to invest in a company that has a leading position in a certain area, building up enough barriers to competition, which will inevitably lead to high profits, that is, the "very good money" mentioned later. Buffett's list of shares, Johnson's last quarter net interest rate of more than 20%, Nike 14%, General Electric, Mobil Oil and other shares of the net interest rate of more than 10% long-term stability. Anti-view education and training companies, although phased to 10% of the profit level, but it is difficult to continue. Buffett said that the time to hold every stock is "forever". That is, the healthy development of enterprises, through dividends, stock Shang and other ways to give back to shareholders, long-term holding can obtain a stable and considerable income, which is the origin of its "value investment." However, the education and training market is facing strong policies and market fluctuations, and no one has established absolute brand, channel barriers, not to mention the prediction of the situation after ten years, 35 may be a huge change. This kind of company is obviously not Buffett's favorite. (Zhang) Buffett-owned companies and companies that have invested in alphabetical order (multi-Knowledge Network map)