From a financial institution:
"The expense ratio on several of the funds you hold in this account have changed."
Yeah! Two expense ratios went down.
Boo! Bad grammar.
This should be changed to
"The expense ratios on several of the funds you hold in this account have changed."
or
"The expense ratio on several of the funds you hold in this account has changed."
And perhaps "on" should be "of" (if you don't mind two cases of "of" in this sentence).