By law, REITs are required to pay out at least 90% of income as dividends, eliminating the double-tax effect on dividends.

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The heavier weight on STEM helps minimize the effect of a double-counted STEM worker in a tech company.

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Those policies had the unintended effect of prolonging double-digit unemployment, principally by making it more expensive and difficult for employers to hire people.

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Other complaints include that the series of downgrades spreads fear of a domino effect across Europe that could cause a double-dip in EU economies.

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Important obstacles for Citi include political action, with Dodd-Frank, Basel III, and other regulation beginning to take effect, and a weaker than expected, double-dipping housing market.

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But despite the side effect, patients with severe MS wanted Tysabri, and sales were growing at a double-digit clip.

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