Megafins, or mega-financial institutions, are behemoths dominating the global financial landscape. They encompass global banks, insurance companies, asset managers, and other diversified financial conglomerates whose size and interconnectedness pose unique challenges and opportunities for the financial system. Their sheer scale allows them to offer a comprehensive range of financial services, driving economies of scale and potentially lowering costs for consumers and businesses. However, this concentration of power also introduces systemic risk, creating moral hazard and raising concerns about financial stability. One of the primary benefits of megafins is their ability to mobilize capital on a vast scale. They facilitate large-scale infrastructure projects, support global trade, and provide essential financing for businesses of all sizes. Their sophisticated risk management capabilities, often built upon decades of experience and significant investment in technology, enable them to navigate complex global markets and absorb shocks better than smaller institutions. This allows them to continue lending and providing essential financial services during periods of economic uncertainty. However, the “too big to fail” (TBTF) designation casts a long shadow. The implicit guarantee that governments will intervene to prevent the collapse of a megafin incentivizes excessive risk-taking. These institutions may pursue aggressive growth strategies and engage in complex financial transactions knowing that their failure would have catastrophic consequences for the entire economy. This creates a moral hazard problem, where the cost of failure is borne by taxpayers while the profits accrue to shareholders and executives. Furthermore, the interconnectedness of megafins creates a complex web of relationships that can amplify systemic risk. The failure of one megafin can quickly cascade through the entire financial system, triggering a domino effect of defaults and creating a credit crunch. This was vividly illustrated during the 2008 financial crisis, where the collapse of Lehman Brothers triggered a global recession. Regulatory efforts since the crisis have focused on addressing these challenges. Dodd-Frank in the United States and similar regulations in other countries aim to strengthen capital requirements, enhance supervision, and improve resolution mechanisms for megafins. These regulations require institutions to hold more capital, undergo stress tests to assess their resilience to economic shocks, and develop “living wills” outlining how they can be resolved without government bailouts. Despite these efforts, the TBTF problem persists. The complexity of megafins and the difficulty of resolving them without causing widespread disruption remain significant challenges for regulators. Some argue that breaking up megafins into smaller, more manageable entities is the only effective way to mitigate systemic risk. Others believe that enhanced regulation and supervision, coupled with robust resolution mechanisms, can sufficiently address the risks posed by these institutions. Ultimately, the future of megafins will depend on the ongoing efforts to balance their benefits with the need to safeguard financial stability. Effective regulation, robust supervision, and a commitment to responsible risk management are essential to ensuring that these institutions contribute to economic growth without jeopardizing the health of the global financial system.