Over the last decade, foreign currency indebtedness in Hungary has become a systemic financial problem, and its crippling impact on the real economy has been aggravated by its significant constraints on economic policy. In international comparative terms, however, there are certain specific features relating to Hungary which make this issue particularly problematic, and during the financial crisis both exchange rates and interest rates were important factors in increasing the burden on individual households. We present here a case study whereby our research focuses on the causes and determining factors of the pricing of Swiss franc-denominated mortgage loans. Our empirical exercise examines four potential price shocks which might have affected the pricing decisions of credit institutions: foreign currency interest rates, the country risk premiums (measured by Credit Default Swap (CDS) spread), the deteriorating quality of the loan portfolio and the taxes levied on banks. The questions which arise concern the relationship of these costs to the changes in interest rates and the extent to which these cost shocks were passed on by banks to their clients. Empirical evidence based on Vector Error Correction Model (VECM) shows a significant long-run relationship between cost factors and CHF denominated mortgage loans interest rates — with a reasonable sign and magnitude of parameters, but also with moderate forecasting power. Finding a tractable solution to the foreign currency debt trap is only possible if a fair distribution of burdens is achieved, and this should be supported by empirical facts. At the end of the day, all three affected parties (debtors, banks, and the Hungarian State) had made their contribution, but how fair and reasonable the distribution was remains an open issue for further research.