What does "required supplementary information" typically include for fiduciary funds?

Required supplementary information (RSI) for fiduciary funds primarily includes schedules related to pension funds, making the focus on this element particularly crucial. These schedules are essential for providing additional context and clarity about the pension plans, detailing funding progress, actuarial assumptions, changes in net pension liability, and other relevant data that aids users of the financial statements in understanding the funding status and obligations associated with the pension funds.

RSI is meant to supplement and provide more detail beyond what is presented in the basic financial statements. In the context of fiduciary funds, this information helps stakeholders, such as taxpayers and beneficiaries, assess the financial health and sustainability of the funds, particularly regarding pension liabilities.

The other options, while relevant to various financial reporting contexts, do not align as closely with the specific requirements set forth in governmental accounting standards for fiduciary funds. For instance, detailed revenue analysis and administrative overhead costs typically pertain to operational budgets rather than fiduciary reporting. Similarly, while a funds' historical performance summary is useful, it does not specifically address the stringent requirements for pension fund disclosures that are clarified through supplementary schedules. Thus, the emphasis on schedules for pension funds accurately reflects the expectations for required supplementary information in fiduciary fund reporting.