General Electric's stock experienced its biggest one-day percentage drop since April 2008.
The stock decrease came after Harry Markopolos, who is known as the whistleblower in Bernie Madoff's 2008 Ponzi scheme, accused GE of engaging in fraud.
Markopolos claims GE is hiding nearly $40 billion of losses in its insurance business. GE board member Leslie Seidman said the allegations are "baseless" and "inflammatory."
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The Harvard Business Review finds more than 75% of brands have a dedicated budget for influencer marketing, and a study from social media resource Influencer Marketing Hub said the industry is expected to grow $21.1 billion this year.