Roleset id: underperform.01 , to perform not as well as smth else, Source: , vncls: , framnet: underperform.01: UNDERPERFORM-V NOTES: Frames file for 'underperform' based on survey of sentences in the WSJ corpus. (from underperform.01-v predicate notes)
Arg1-PPT: entity compared to
Example: transitive with adverbials
person: third,  tense: present,  aspect: ns,  voice: active,  form: full
But while the merits of diversification shine through when times are tough, there's also a price to pay: A diversified portfolio always underperforms an undiversified portfolio during those times when the investment in the undiversified portfolio is truly hot.
Arg0: A diversified portfolio
Arg1: an undiversified portfolio
ArgM-TMP: during those times when the investment in the undiversified portfolio is truly hot