Mississippi Guaranteeing Fair Banking Act; create.

This bill would require large financial institutions (with over $10 billion in assets or annual transactions) to provide customers with specific written explanations when denying or restricting services like checking accounts, loans, or payment services. It prohibits discrimination based on religion, political speech, or lawful economic activities - such as donating to a cause or exercising free speech - while excluding insurance and securities. Customers could request these explanations within 90 days of an adverse action, and institutions would have 30 days to detail the specific reasons (not just generic policies) for the decision. The bill applies only to covered financial services and includes exceptions for standard account issues like inactivity or legal restrictions.