Systemic risk in banking systems is a crucial issue that remains to be completely addressed. In our toy model, banks are exposed to two sources of risks, namely, market risk from their investments in assets external to the system and credit risk from their lending in the interbank market.
This paper approaches the PPP puzzle by using the Bitcoin/US Dollar exchange rate. The use of the virtual currency as macroeconomic laboratory allows us to remove frictions that previously impeded the empirical demonstration of the law of one price.
This paper provides a mapping from portfolio risk diversification into the pairwise correlation between portfolios.
The excessive increase of leverage, i.e. the abuse of debt financing, is considered one of the primary factors in the default of financial institutions since it amplifies potential investment losses. On the other side, portfolio diversification acts to mitigate these losses.
We develop a model that captures, at the same time, the temporal dynamics of single-firm credit risk and the contagion across banks via a network of obligations and common assets.
The Thesis investigates from a theoretical perspective the relationship between leverage, diversification and systemic risk. Moving from the folk wisdom that asset diversification enhances financial stability by dispersing credit risks, we contribute to the debate shedding light on a critical facet of this strategy.