Stock Market Overvaluation, Moon Shots, and Corporate Innovation

64 Pages Posted: 28 Dec 2017

See all articles by Ming Dong

Ming Dong

York University - Schulich School of Business

David A. Hirshleifer

University of California, Irvine - Paul Merage School of Business; NBER

Siew Hong Teoh

University of California, Irvine - Accounting Area

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Date Written: December 2017

Abstract

We test how market overvaluation affects corporate innovation. Estimated stock overvaluation is very strongly associated with R&D, innovative output, and measures of innovative novelty, originality, and scope. R&D is much more sensitive than capital investment to overvaluation. Misvaluation affects R&D more via a non-equity channel than via equity issuance. We document how the sensitivity of R&D and innovative outcomes to misvaluation depends on growth, overvaluation, and turnover. The frequency of exceptionally high innovative inputs/outputs increases with overvaluation. This evidence suggests that market overvaluation may generate social value by increasing innovative output and by encouraging firms to engage in ‘moon shots.’

Suggested Citation

Dong, Ming and Hirshleifer, David A. and Teoh, Siew Hong, Stock Market Overvaluation, Moon Shots, and Corporate Innovation (December 2017). NBER Working Paper No. w24142. Available at SSRN: https://ssrn.com/abstract=3092990

Ming Dong (Contact Author)

York University - Schulich School of Business ( email )

4700 Keele Street
Toronto, Ontario M3J 1P3
Canada
416-736-2100 ext. 77945 (Phone)
416-736-5687 (Fax)

David A. Hirshleifer

University of California, Irvine - Paul Merage School of Business ( email )

Irvine, CA California 92697-3125
United States

HOME PAGE: http://sites.uci.edu/dhirshle/

NBER ( email )

1050 Massachusetts Avenue
Cambridge, MA 02138
United States

Siew Hong Teoh

University of California, Irvine - Accounting Area ( email )

Irvine, CA 92697-3125
United States

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