Trump's tweets and the US stock market

Research by Professor Bert Scholtens on financial market response to President Trump's Twitter messages has been published by multidisciplinary journal PLoS ONE.

The study, which was carried out with Heleen Brans of the University of Groningen, found that supportive tweets from the personal account of Donald Trump have not resulted in a significant stock market response. In contrast, strongly negative posts from this account have reduced the US stock market value of companies named in the tweets.

Read in PLoS ONE: 'Under his thumb the effect of president Donald Trump's Twitter messages on the US stock market'.
Read University of St Andrews news story 'Are US businesses under Trump's Twitter thumb?'.