QUOTE(yok70 @ Feb 26 2011, 08:01 PM)
Found this thing:
http://www.magicformulainvesting.com/how_mfi_works.html
Use the Stock Screener to select the top-rated stocks from our database. Choose the number of stocks to view, and choose the size of the company you want in the list. Choosing more companies leads to greater diversification, and choosing larger companies generally leads to less volatility. Eliminate any companies you do not want to own for any reason; however, you should keep at least 20 stocks in an effort to properly manage risk.
So, holding 20+ stocks is good now?
The site is run by Joel Greenbalt - a hedgie who returns an impressive 40+% p.a. return since 1985. The Magic Formula site is actually the extension of his book-The Little Book that Beats the Market. If you are interested, try pick it up and read. It is quite short, can probably read it within an hour without buying it from book shop.http://www.magicformulainvesting.com/how_mfi_works.html
Use the Stock Screener to select the top-rated stocks from our database. Choose the number of stocks to view, and choose the size of the company you want in the list. Choosing more companies leads to greater diversification, and choosing larger companies generally leads to less volatility. Eliminate any companies you do not want to own for any reason; however, you should keep at least 20 stocks in an effort to properly manage risk.
So, holding 20+ stocks is good now?
What the magic formula says is that, Joel back tested the returns data of US stocks and found that by just buying stock that are ranked with high ROIC+Low PE, the portfolio of stock will outperform the market and most fund managers by a significant margin. Joel method is subsequently tested on international stocks and it is found to have similar characteristics, that is, if you buy stocks with low PE + high ROIC, you will beat the market.
The reason for the 20+ stock holdings is that, the Magic Formula do not require any due diligence and research, you just buy what the magic formula list tell you to do. So, a concentrated portfolio is not suitable in this case as stocks may be cheap for a valid reason. It may have problems that fundamentally affects its operations. Without research, you won't know these reasons. So, by buying 20 stocks, it hopefully will diversify away the risks of some stocks that will go to zero.
Feb 27 2011, 12:23 AM

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