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This whistleblowing case study engages students in discussions about when and how to disclose differences of opinion on a revenue recognition matter with higher-ups in an organization. Factors to consider include the morality of whistleblowing, confidentiality obligations, the rules of conduct in the American Institute of Certified Public Accountants (AICPA) Code, Sarbanes–Oxley Act (SOX), Dodd–Frank, and the US Supreme Court ruling in Digital Realty, Inc. v. Somers that addresses when to report matters to the Securities and Exchange Commission (SEC). Case questions are designed to promote students’ critical thinking skills, ethical reasoning skills, and decision-making. A flowchart of AICPA ethics rule 2.130.020 (Subordination of Judgment) provides the framework for making decisions when differences exist in financial reporting. The case provides learning objectives, implementation guidance, and teaching notes. The case was used in an accounting ethics course taught at the undergraduate senior level but can also be used in auditing, fraud examination, and advanced financial reporting courses.

Introduction: The effect of environmental regulations or green policies on the financial health of businesses is still up for debate. The Prime Minister of India presented a bold plan to achieve net-zero emissions by 2070 at the COP26 climate summit in Glasgow (UK). Following this announcement, numerous Indian companies voluntarily committed to becoming carbon neutral to support the ambitious emission reduction targets. A growing body of research examines the link between environmental standards compliance and businesses’ sustainability measures, and how they affect their overall performance (profitability, stock returns, or output generation).

Purpose: The research assesses the effect of these voluntary announcements on the stock performance of Indian companies in the context of voluntary commitments to reduce carbon emissions.

Methodology: Concentrating on the announcement impact of carbon neutrality commitments/carbon emissions reductions of 52 Indian companies, the study considers carbon neutrality pledges/carbon emissions reduction from 2018 to 2022. The sample companies list was taken from various indices on the National Stock Exchange. A standard event study methodology is applied to compute abnormal returns during the event window of (−10, 10).

Findings: The results show that companies announcing the carbon neutrality pledges/carbon emissions reduction received significantly negative abnormal returns of 0.49% on announcement day. The cumulative average abnormal returns for different windows are also negative. It signifies that investors don’t value the environmentally sustainable actions of firms. It may also be because of investors’ ignorance of carbon neutrality pledges and their importance, highlighting the need to educate investors about the significance of corporate sustainability initiatives.