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After the close of trading on Friday BlackRock Inc (NYSE:BLK). will replace Genzyme Corp (NASDAQ:GENZ). in the S&P 500 index (SNP:^GSPC). S&P is making the change because biotech company Genzyme announced last month that it would be taken private for $20.1 billion by
When constructing a portfolio, most investors focus on the decisions that seem to have the most significant impact on the risk/return profile delivered. How much should be allocated to stocks vs.