Choosing the optimum supervisory model to manage financial stability requires a consideration of country-specific preferences based on the level of market development and the configuration of the financial system. The choice of model, its structural design, and the regulatory mandates will influence a supervisor’s effectiveness for managing financial stability. This Chapter analyzes the sectoral models in Mainland China, the United States, and Hong Kong to showcase institutional design elements and variations across different financial systems. The chapter assesses the advantages and disadvantages of the unified central bank and banking supervisory design of the Hong Kong Monetary Authority. Understanding how monetary policies affect banking institutions can be critical for maintaining banking sector stability. A unified structure creates a supervisory synergy when calibrating the lender of last resort and unconventional liquidity tools because coordination tensions are eliminated. The Hong Kong Monetary Authority is compromised because of the Linked Exchange Rate System and the Interest Rate Adjustment Mechanism inhibits its ability to set and control interest rates which can destabilize the banking sector.