HSBC's business model operates across four global businesses — Wealth and Personal Banking (WPB), Commercial Banking (CMB), Global Banking and Markets (GBM), and Global Private Banking — each generating revenue through distinct mechanisms while sharing the common infrastructure of HSBC's global network, technology platforms, regulatory licenses, and customer relationships. Wealth and Personal Banking is HSBC's largest segment by customer count, serving approximately 39 million retail and wealth management customers across its primary markets. Revenue is generated through net interest income on deposits and loans, fees on wealth management products including mutual funds, structured products, and life insurance, and foreign exchange transaction revenue from the cross-border financial needs of internationally mobile customers. HSBC's WPB business has progressively shifted its resource allocation toward higher-net-worth customers — the Premier and Jade tiers — where revenue per customer is substantially higher and where HSBC's international network provides genuine differentiation over domestic-only competitors. A wealthy Hong Kong entrepreneur who needs investment accounts in London, insurance in Singapore, and property finance in Canada is a customer that HSBC can serve comprehensively; domestic banks in each market can only address one dimension of that need. Commercial Banking serves approximately 1.3 million business customers ranging from small enterprises to large mid-market companies. CMB generates revenue through lending spread (the difference between funding costs and loan pricing), transaction banking fees for payments, cash management, and trade finance, and foreign exchange revenue from companies managing multi-currency receivables and payables. HSBC's CMB franchise is disproportionately valuable in the trade finance segment, where the bank's network spanning both originating and destination countries for trade flows provides a connectivity advantage that domestic-only commercial banks cannot replicate. A Chinese manufacturer exporting to European retailers needs a bank that can handle letters of credit, documentary collections, and supply chain finance on both sides of the transaction — HSBC's dual presence makes it the natural choice in a way that JPMorgan or Deutsche Bank, with thinner Asian networks, cannot fully match. Global Banking and Markets serves HSBC's largest corporate and institutional clients with investment banking, capital markets, and markets products. GBM generates revenue through advisory fees on mergers, acquisitions, and capital raises; primary issuance fees on debt and equity offerings; trading revenues from market-making in currencies, rates, credit, and equities; and structured finance fees. HSBC's GBM franchise is strongest in Asian capital markets — the bank is consistently among the top arrangers of Asian G3 bonds (dollar, euro, and yen-denominated bonds issued by Asian entities) — and in cross-border financing that requires regulatory relationships and market expertise in multiple jurisdictions simultaneously. The bank is less competitive in purely domestic capital markets in Europe and North America, where Wall Street firms and European universal banks have deeper relationships and greater distribution capacity. The interest rate environment's impact on HSBC's revenue model deserves particular attention. HSBC's significant deposit base — the bank held approximately 1.6 trillion dollars in customer deposits as of 2023 — means that rising interest rates generate substantial incremental net interest income as deposit repricing lags asset repricing. The 2022-2023 rate rising cycle produced a dramatic improvement in HSBC's net interest income, with the group's NII increasing by tens of billions of dollars as rates rose globally. This structural rate sensitivity creates revenue cyclicality that investors must account for when assessing sustainable earnings capacity: the extraordinary NII of 2023 will partially reverse as rates normalize. HSBC's funding model relies on its substantial and geographically diversified deposit base — a stability advantage over investment banks that depend more heavily on wholesale funding markets. The deposit base's stability, combined with HSBC's strong credit ratings and established presence in major bond markets, allows the bank to fund its assets at competitive rates across economic cycles. This funding advantage is particularly valuable in periods of market stress when wholesale funding costs spike and institutions without stable deposit bases face liquidity pressure.