When It Comes to Half-Truths, No News Is Bad News

Insights by Stanford Business, March 15, 2023

by Theodore Kinni


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Voluntary disclosures, like those issued by managers in quarterly earnings calls, inform investment decisions across financial markets. They can buoy — or puncture — corporate valuations and stock prices. But it isn’t always clear what effects result from the policies governing these disclosures, especially when it comes to rules about half-truths and the duty to update.

In a new article in Management Science, Anne Beyer, a professor of accounting at Stanford Graduate School of Business, and Ronald Dye of Northwestern’s Kellogg School of Management, use static and dynamic models to understand the effects of regulation on both voluntary corporate disclosure policies and the investors who depend on them.

Half-truths are disclosures that are true in and of themselves but misleading in light of other information managers know but choose to withhold. For example, if a company announces that it will be losing one of its major customers but doesn’t mention that it’s also aware that another major customer is likely to leave, that would be a half-truth. These kinds of omissions are illegal under federal securities law, but their definition is not universally agreed upon. This creates loopholes that can make it difficult to hold managers legally accountable for skirting the whole truth.

Legality aside, whether permitting half-truths in disclosures is preferable to prohibiting them is an open question. Many disclosure regulations aim at providing transparency for investors and other stakeholders. However, it is not self-evident whether barring managers from issuing half-truths leads them to disclose more information.

On the one hand, if a prohibition of half-truths is enforced, then a firm that wants to make a disclosure must disclose the entire truth and cannot selectively withhold part of the relevant information. This may cause the firm to not make any disclosure. On the other hand, if half-truths are allowed, a firm may be willing to share some information on a topic that it would be unwilling to share if full disclosure was required. Read the rest here.