This bill modifies tax rules affecting financial guaranty insurance companies, which provide insurance on bonds and other financial instruments. Currently, these companies may be classified as "passive foreign investment companies" (PFICs) under federal tax law, which triggers special tax reporting requirements and restrictions on U.S. investors. The bill creates an exception allowing certain financial guaranty insurance companies to qualify as regular insurance corporations instead, provided they meet specific accounting standards and exposure thresholds set by insurance regulators. The changes apply to tax years beginning after December 31, 2024, and include a grace period allowing companies that may have been misclassified as PFICs in prior years (between 2018 and 2024) to correct their status without penalty. The bill also requires the Treasury Department to issue guidance on how companies should report the transition and handle any prior tax elections.