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140 characters: Politicians on Twitter
Investors are used to stock market volatility but increasingly face a new challenge – rogue politicians on Twitter.
In September 2015, the Nasdaq Biotechnology index fell by 5% on a tweet from Hillary Clinton which said: ‘Price gouging like this in the speciality drug market is outrageous’ and promised to ‘take it on.’
US President-elect Donald Trump complained on Twitter about Lockheed Martin’s ‘out of control’ costs on 12 December 2016. According to The Guardian, Lockheed Martin’s share price drop amounted to $28.6m of market value per character tweeted.