Policy News and Stock Market Volatility

54 Pages Posted: 1 Apr 2019

See all articles by Scott R. Baker

Scott R. Baker

Northwestern University, Kellogg School of Management, Department of Finance

Nicholas Bloom

Stanford University - Department of Economics; National Bureau of Economic Research (NBER)

Steven J. Davis

University of Chicago; National Bureau of Economic Research (NBER); Hoover Institution

Kyle Kost

University of Chicago

Multiple version iconThere are 2 versions of this paper

Date Written: March 2019

Abstract

We create a newspaper-based Equity Market Volatility (EMV) tracker that moves with the VIX and with the realized volatility of returns on the S&P 500. Parsing the underlying text, we find that 72 percent of EMV articles discuss the Macroeconomic Outlook, and 44 percent discuss Commodity Markets. Policy news is another major source of volatility: 35 percent of EMV articles refer to Fiscal Policy (mostly Tax Policy), 30 percent discuss Monetary Policy, 25 percent refer to one or more forms of Regulation, and 13 percent mention National Security matters. The contribution of particular policy areas fluctuates greatly over time. Trade Policy news, for example, went from a virtual nonfactor in equity market volatility to a leading source after Donald Trump’s election and especially after the intensification of U.S-China trade tensions. The share of EMV articles with attention to government policy rises over time, reaching its peak in 2017-18. We validate our measurement approach in various ways. For example, tailoring our EMV tracker to news about petroleum markets yields a measure that rises and falls with the implied and realized volatility of oil prices.

Suggested Citation

Baker, Scott R. and Bloom, Nicholas and Davis, Steven J. and Kost, Kyle, Policy News and Stock Market Volatility (March 2019). NBER Working Paper No. w25720, Available at SSRN: https://ssrn.com/abstract=3363456

Scott R. Baker (Contact Author)

Northwestern University, Kellogg School of Management, Department of Finance ( email )

Evanston, IL 60208
United States

Nicholas Bloom

Stanford University - Department of Economics ( email )

Landau Economics Building, Room 231
579 Serra Mall
Stanford, CA 94305-6072
United States
650-725-7836 (Phone)

HOME PAGE: http://economics.stanford.edu/faculty/bloom

National Bureau of Economic Research (NBER) ( email )

1050 Massachusetts Avenue
Cambridge, MA 02138
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Steven J. Davis

University of Chicago ( email )

5807 S. Woodlawn Avenue
Chicago, IL 60637
United States
773-702-7312 (Phone)
773-702-0458 (Fax)

National Bureau of Economic Research (NBER)

1050 Massachusetts Avenue
Cambridge, MA 02138
United States

Hoover Institution

434 Galvez Mall
Stanford University
Stanford, CA 94305-6010
United States
773 251 1795 (Phone)

Kyle Kost

University of Chicago ( email )

1101 East 58th Street
Chicago, IL 60637
United States

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