Over a year has passed since UBS’ rushed takeover of Credit Suisse saved the latter from probable collapse. While the Swiss government aided deal has been hailed as a success by some, others are still lamenting losses caused by perceived injustices in their treatment.

One such group is Credit Suisse’s AT1 bondholders, who saw the value of their investments written down to zero as part of the deal. These investors are not alone in considering their treatment unfair, with a number o...