Only a handful of stocks, the 10 largest, are responsible for 53% of the S&P 500โ€™s 4.7% advance this year according to Fundstrat Global Advisors. You know the names. But these three stand out the most as The WSJโ€™s Chris Dieterich writes, “Technology-oriented companies dominate the list:ย Appleย AAPLย 0.55%ย Inc., the worldโ€™s largest company by market capitalization, is up more than 22% this year through Monday. Social-media companyย Facebookย Inc.ย FBย 1.46%ย has risen nearly 23% while e-commerce powerhouseย Amazon.comย Inc.AMZNย 1.96%ย has climbed 20%.โ€

Itโ€™s a perpetual-cycle. As money flows into index funds that money is required to go into these stocks. Is that the best way to invest your money? Is it blind luck? Very few investors know when to sell.ย And it has been myย experience that they often learn this lesson the hard way over and over again during their investing lifetime.