Definition of "underperformance" []

• The state or quality of underperforming (noun)

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• ""They're making a lot of changes, and not just because they had an awful 2007," but also because of longer-term underperformance in some cases, said Wenli Tan, an analyst at Morningstar Inc."
• "Long-term underperformance of megacap stocks may not end so fast even though they now carry price earnings ratios lower then before."
• "Short-term underperformance alone is not a sell sign."