un·der·per·form 
(ŭn′dər-pər-fôrm)
(ŭn′dər-pər-fôrm)v. un·der·per·formed, un·der·per·form·ing, un·der·per·forms
v.tr.
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.
v.intr.
To exhibit a level of performance that is below the standard: a company that underperformed last year.
un′der·per·formance n.
un′der·per·former n.