Underperform

v. perform at a lower level or speed than was expected; (about a security) appreciate at a rate lower than the market average (Finance)

Verb
1. perform less well or with less success than expected; "John consistently underachieves, although he is very able"; "My stocks underperformed last year"
(synonym) underachieve
(hypernym) do, perform
(derivation) underachiever, underperformer, nonachiever
2. perform too rarely; "Her plays are underperformed, although they are very good"
(hypernym) perform
(classification) performing arts

When a security is expected to, or does appreciate at a slower rate than the overall market.