The white paper examines the impact of a diversified funding mix on interest income. In particular, the unexpected increase in customer deposits at cantonal banks during the Credit Suisse "bank run" in the fourth quarter of 2022 serves as a basis. Instead of exercising prudence in a first step and allocating a portion of these newly acquired and potentially unstable inflows to high-quality liquid assets (HQLA), a large part of the deposits was used to refinance new loans. Constant pressure on profitability led to a reallocation of HQLA positions toward financial assets. Maintaining a diversified funding portfolio can not only mitigate the reduction in liquidity when deposits are withdrawn, but also help stabilize profitability and, in conjunction with a sound investment strategy, generate higher risk-adjusted returns.