This bill amends the Internal Revenue Code of 1986 to establish special rules for financial guaranty insurance companies, aiming to prevent their classification as passive foreign investment companies (PFICs). It modifies Section 1297(f)(3) to allow these companies to include their unearned premium reserves in applicable insurance liabilities under specific conditions. To qualify, a company must meet financial criteria, such as reporting a financial guaranty exposure of at least 15-to-1 or a State or local bond exposure of at least 9-to-1 on its financial statements. The inclusion of unearned premium reserves must also align with generally accepted accounting principles and adhere to single risk limits defined by the Financial Guaranty Insurance Guideline , a 2008 NAIC model regulation. The legislation defines a "financial guaranty insurance company" as one exclusively writing or reinsuring financial guaranty insurance as per the Guideline. It also clarifies how certain financial statement items, like exposure ratios, are to be reported, and grants the Secretary of the Treasury authority to require reporting from U.S. persons with interests in non-publicly traded foreign corporations claiming non-PFIC status. These amendments generally apply to taxable years beginning after December 31, 2024. A crucial transitional rule provides a "specified grace period" for qualified financial guarantee insurance companies , from 2018 through 2024, during which they will not be treated as PFICs solely due to their status, allowing for adjustments and potential revocation of prior elections.