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v. un·der·per·formed, un·der·per·form·ing, un·der·per·forms
1. To perform not as well as (something else): three stocks that underperformed the market as a whole.
2. To perform (a musical or theatrical work, for example) too seldom: In recent years, her plays have been underperformed.
To exhibit a level of performance that is below the standard: a company that underperformed last year.

un′der·per·for′mance n.
un′der·per·form′er n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.underperformer - a student who does not perform as well as expected or as well as the IQ indicatesunderperformer - a student who does not perform as well as expected or as well as the IQ indicates
educatee, pupil, student - a learner who is enrolled in an educational institution
2.underperformer - a business that is less successful than expectedunderperformer - a business that is less successful than expected
business, business concern, business organisation, business organization, concern - a commercial or industrial enterprise and the people who constitute it; "he bought his brother's business"; "a small mom-and-pop business"; "a racially integrated business concern"
References in periodicals archive ?
The Abu Dhabi Securities Exchange General Index, which has been an underperformer compared to Dubai index, jumped 2.
British holiday company Thomas Cook was a standout underperformer, slumping 19 percent after it said its chief executive Harriet Green was stepping down, two years after leading a turnaround of the group.
The AUD was the main underperformer on the day, giving back some of the prior days' gains.
But many boards have been less inclined to deal with a more insidious phenomenon in their midst--the 'go-along-to-get-along' underperformer who makes no waves but also adds little value.
The Shanghai property sub-index was a key underperformer among sectors, down 1.
We are an embarrassment and we are a great underperformer," he said.
Leaving conspiracy theories aside, we highlight that Rostelecom's stock has been an underperformer YtD.
It's clear from last week's debate the country wants change," smarmed underperformer David Cameron.
After being the clear underperformer in the overnight session following the S&P outlook downgrade to the UK, Sterling has been outperforming in the US as traders use the dips as formidable buy opportunities after discounting the rating agency downgrade and instead focusing in on the stronger retail sales and prospects for global macro recovery.
It will look inconsistent to a judge or jury, however, if an underperformer gets the same raise as another employee doing well.
Rosen outlines how sales managers, executives, and business owners can coach and motivate their salespeople to bring in more sales, and integrate a model into the team's plan, as well as how to turn around or fire an underperformer.
HE was the biggest underperformer in a Reds top since Butlins hired Shane Richie, but former Liverpool striker Erik Meijer finally has something to celebrate.