The economic and regulatory concept of "too big to fail" refers to a corporate philosophy and systemic reality where certain financial institutions—typically massive, highly interconnected megabanks and global financial conglomerates—are deemed so vital and deeply integrated into the economic framework that their sudden bankruptcy or collapse would trigger catastrophic domino effects throughout the entire global financial system. Because the failure of such a massive institution would freeze credit markets, wipe out depositor savings, and cause severe economic depression, governments and central banks have historically felt compelled to orchestrate massive bailouts or provide emergency financial interventions to rescue them from insolvency during severe market crises, creating significant moral hazard challenges.