Under his thumb the effect of president Donald Trump’s Twitter messages on the US stock market

Heleen Brans; Bert Scholtens

doi:10.1371/journal.pone.0229931

Under his thumb the effect of president Donald Trump’s Twitter messages on the US stock market

Heleen Brans, Bert Scholtens

Centre for Responsible Banking and Finance

Research output: Contribution to journal › Article › peer-review

Abstract

Does president Trump’s use of Twitter affect financial markets? The president frequently mentions companies in his tweets and, as such, tries to gain leverage over their behavior. We analyze the effect of president Trump’s Twitter messages that specifically mention a company name on its stock market returns. We find that tweets from the president which reveal strong negative sentiment are followed by reduced market value of the company mentioned, whereas supportive tweets do not render a significant effect. Our methodology does not allow us to conclude about the exact mechanism behind these findings and can only be used to investigate short-term effects.

Original language	English
Article number	e0229931
Number of pages	11
Journal	PLoS ONE
Volume	15
Issue number	3
DOIs	https://doi.org/10.1371/journal.pone.0229931
Publication status	Published - 11 Mar 2020

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10.1371/journal.pone.0229931Licence: CC BY

Brans-2020-Under-his-thumb-PONE-0229931
Copyright © 2020 Brans, Scholtens.This is an open access article distributed unde rthe terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Final published version, 723 KBLicence: CC BY

Cite this

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abstract = "Does president Trump{\textquoteright}s use of Twitter affect financial markets? The president frequently mentions companies in his tweets and, as such, tries to gain leverage over their behavior. We analyze the effect of president Trump{\textquoteright}s Twitter messages that specifically mention a company name on its stock market returns. We find that tweets from the president which reveal strong negative sentiment are followed by reduced market value of the company mentioned, whereas supportive tweets do not render a significant effect. Our methodology does not allow us to conclude about the exact mechanism behind these findings and can only be used to investigate short-term effects.",

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Under his thumb the effect of president Donald Trump’s Twitter messages on the US stock market

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