(SLATE) — A striking chart from Morgan Stanley’s Adam Parker shows that 2012 earnings growth among S&P 500 companies was highly concentrated, with 88 percent of it coming from the top 10 firms. I was even more struck by the inequality within the top 10. Just four companies—Apple, AIG, Goldman Sachs, and Bank of America—together provided a majority of overall earnings growth among large-cap companies.

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