Small caps: Small is bountiful – but decreasingly so

Small and mid-sized companies have outperformed larger ones for the past six years and their winning streak has so far continued into this year. While the S&P 500 has risen 2.2% year to date, the S&P 400 mid-cap index has shot up 7.7% and the small-cap S&P 600 by 4.7%.

According to the Hoare Govett Small companies index report, an annual review of small-cap performance compiled by ABN Amro and the London Business School, small companies outperformed large ones in 15 out of the 22 countries studied in 2006. In only three countries, Portugal, Japan and Ireland, was their performance significantly worse.

Such superior performance has won small companies some big fans, such as hedge funds, but there are growing signs that the attention lavished on them might be making them less interesting.

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