Bank of America operates a substantial, fully integrated universal banking model. Its 'Consumer Banking' division (thousands of physical branches and a digital app) generates stable, low-cost deposit funding. It uses this considerable pool of cheap capital to fund its lucrative 'Global Wealth and Investment Management' division (Merrill Lynch) and its significant 'Global Banking' division, generating Net Interest Income and high-margin advisory fees. Bank of America's model relies heavily on its low-cost deposit base, gathered through its ubiquitous national footprint of retail branches. This immense pool of effectively free capital allows the bank to generate net interest income (NII) by lending out to consumers and corporations, making it sensitive to the Federal Reserve's interest rate policies. To offset the cyclical volatility of lending, BofA heavily relies on its Global Wealth and Investment Management division (anchored by Merrill Lynch), which generates sticky, fee-based revenue from high-net-worth clients that is immune to interest rate fluctuations. its Global Markets division provides critical trading, clearing, and advisory services to institutional clients. This diversified, 'universal banking' structure ensures that when one segment of the economy falters, other divisions provide the necessary stability to sustain the bank's dividend and share repurchase programs.