The environmental pollution caused by Advanced Semiconductor Engineering in October 2013 in Taiwan highlighted the fact that foreign investors tend to support the classical economic ideas of arbitrage and shareholder wealth maximization, which is in conflict with the fact that institutional investors in the current global capital market lean towards the stakeholder theory in ethical investments. Will local investors’ decision-making also be influenced by differences in the perceived ethics of negative environmental corporate social responsibility (ECSR)? Compared to the remedial measures implemented by British Petroleum for the 2010 Deepwater Horizon oil spill, Advanced Semiconductor Engineering, another international corporation, decided to not respond to any news regarding the toxic wastewater incident. In contrast, Advanced Semiconductor Engineering only made clearer promises after extreme public pressure. This study investigated whether remedial measures for negative ECSR are an important factor influencing investors’ decisions. The purpose is to clarify the interactions among perceived moral intensity of negative ECSR, the implementation of remedial measures, and the intention of ethical investment. An experimental design was employed to test the hypotheses. The results indicated that perceived moral intensity has a significant negative impact on the intention of ethical investment. The implementation of remedial measures for negative ECSR affects investors’ intent to invest. Finally, positive ECSR remedial measures also serve as a key moderating variable in the relationship between perceived moral intensity and the intention of ethical investment. This study clarified whether the provision of remedial mechanisms can effectively recover or maintain investor investment intent when companies experience negative ECSR.