Swiss & international investors with $5.2 billion (CHF 4.5 billion) of Credit Suisse Additional Tier-1 bonds (AT1) have filed an appeal to Switzerland regulator FINMA (Swiss Financial Market Supervisory Authority) for losses on the AT1 Bonds after a full write-down, with the appeal filed by law firm Quinn Emanuel Urquhart & Sullivan which has a 86% winning record from 2,500 cases. In March 2023, the Swiss Financial Market Supervisory Authority (FINMA) issued a statement to explain the basis of Credit Suisse complete AT1 write-down, providing the contractual basis for Credit Suisse $17.2 billion Tier 1 Capital write-down – A viability event is triggered if extraordinary government support is granted, and Credit Suisse was granted Federal Default Guarantee on 19th March 2023.