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By Daniel Dorchuck
This study explores variation in US bank holding companies’ (BHCs) net inter-est margins (NIMs) and the eﬀects of interest rate risk exposure on NIMs. Interest rate risk (IRR) is intrinsic in maturity transformation and ﬁnancial intermediation as banks take on short-term liabilities in the form of deposits and create assets in the form of loans with longer maturities and diﬀerent repricing proﬁles. Accordingly, interest rate risk is necessary for bank holding companies (BHCs) to be proﬁtable in ﬁnancial intermediation, and net interest margins are chosen as a variable of inter-est because they are an isolated measure of bank’ proﬁtability from interest earning assets. Naturally, BHCs employ maturity pairing and derivative hedging to mitigate IRR and ultimately increase and smooth earnings. Synthesizing banks’ balance sheet and income statement data, macroeconomic variables, credit conditions, and interest rate environment variables, this study hopes to expand on existing work by provid-ing insight on the determinants of NIMs as well as interest rate derivatives’ eﬃcacy in increasing and stabilizing net interest margins. The models presented establish links between long term rate exposure, risk-averse capital positions, and increased margins. Additionally, the models suggest that banks earn smaller spreads (NIMs) in higher interest rate environments but beneﬁt from steeper yield curves.
Advisor: Mary Beth Fisher, Kent Kimbrough | JEL Codes: