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Exploring Joel Greenblatt’s Magic Formula for Picking Value Stocks

The www.magicformulafunds..../ site says "MagicFormulaInvesting... while looking great and easy, is simply not accurate. Professor Greenblatt’s back tests provided accurate results, however, the person responsible for maintaining the website simply isn’t doing it right.Stocks that should be ranked 356 or 253 are showing up in the top 30 as the website doesn’t use an accurate data source. "
www.magicformulafunds..../