When Citicorp, JPMorgan Chase, etc. were found guilty of rate rigging (see http://www.usatoday.com/story/money/2015/05/20/billions-in-bank-fx-settl... ), their "punishment" was the equivalent of having a crook pay $20 for breaking into someone's home.
The idea of repercussions is to discourage the lawbreaker from doing this again; a small fine like this won't have that effect.
There is, however, a fair consequence that would discourage corporations from doing things like this: loss of all citizen privileges for X years, including losing the right to fund any campaign or lobbyist. (see idea here: http://www.alternet.org/economy/california-county-thats-leading-way-cutt... )
It would make corporations and banks think twice before committing a crime.