STEP-BY-STEP ANSWER:
Step 1: Identify that the SEC enforces regulations ensuring that companies provide accurate and truthful financial disclosures.
Step 2: Understand that the AICPA provides ethical guidelines and auditing standards to maintain the integrity of financial statements.
Step 3: Recognize that the FASB establishes and updates accounting standards, addressing new financial issues and complexities as they arise.
Step 4: Realize that together, these bodies help create a robust framework that underpins the credibility and consistency of financial reports.
Final Answer: Policy-setting bodies such as the SEC, AICPA, and FASB have a significant impact on financial reporting by enforcing standards, guiding ethical practices, and continuously updating accounting rules to address evolving issues, thus ensuring reliable and transparent financial statements.