A financial services company needs a custom field for reporting when relating two business accounts...

To configure a custom field for reporting when relating two business accounts to each other, the administrator should configure the custom field on the Account-Account Relationship object. The Account-Account Relationship object is acustom object in Financial Services Cloud that allows you to create and manage relationships between two accounts, such as Household Member, Business Owner, Trustee, or Friend. You can use the Account-Account Relationship object to store additional information about the relationship between two accounts, such as role, start date, end date, or status. You can also use the Account-Account Relationship object to report on the account-account relationships and analyze their impact on your business. Verified References: : Salesforce Help Article [4] : Salesforce Help Article [5]