Do Markets Really Respond to Corporate Sustainability Efforts?

Many firms have undertaken proactive environmental initiatives in recent years -- consider Wal-Mart's efforts to increase energy conservation and, more recently, their sustainable supply chain initiatives. But, does the market see these activities as good value relative to other investment options?

Research in the Journal of Operations Management reveals share price drops when firms commit to voluntary emissions reductions. However, share price goes up when firms announce ISO 14001 certification or corporate donations to environmental causes.

Significantly, the markets ignored all other announcements about new recycling programs, eco-friendly products, or LEED certification.

Researchers Brian Jacobs (Michigan State University), Vinod Singhal (Georgia Institute of Technology) and Ravi Subramanian (Georgia Institute of Technology) analyzed how environmental performance affects shareholder value through stock market reactions. Their work builds on previous research examining the market's reaction to specific types of announcements.

Jacobs and his collaborators looked at two types of announcements of environmental performance appearing in 14 daily business publications such as Financial Times and The Wall Street Journal between 2004 and 2006. These included 417 firm announcements of initiatives to avoid, mitigate, or offset the firm's environmental impacts, and 363 third-party announcements of awards and certifications.

The researchers hypothesized the market would respond positively to both types of announcements, but that third-party awards and certifications would lead to a greater jump in share price than announcements by the firm because of the credibility offered by third parties.

The market reaction to self-reported announcements did not differ from the reaction to third-party announcements. In fact, researchers found the market reacted only to three types of announcements: philanthropy, voluntary emissions reductions, and ISO 14001 certifications.

In the category of self-disclosed firm announcements, philanthropy for environmental causes (such as cash gifts for conservation efforts) generated a positive market reaction, and voluntary emissions reductions (such as pledges or investments to cut emissions) created a negative market reaction. In the category of third-party recognition, ISO 14001 certifications resulted in a significant positive reaction.

Next page: Why the reaction to only three categories?