Parkland survivor David Hogg launches boycott of two largest money managers over gunmaker investments
David Hogg speaks to ABC News (screen grab)

Marjory Stoneman Douglas High School student and Parkland shooting massacre David Hogg has launched a boycott against two of the largest money managers over their investments in firearms companies.

Hogg, who is followed by over 750,000 accounts on Twitter, used the social networking platform to launch the boycott on Tuesday.

"Imagine a world in which two asset managers call the shots, in which their wealth exceeds current U.S. GDP and where almost every hedge fund, government and retiree is a customer," Bloomberg suggested in December. "It’s closer than you think. BlackRock Inc. and Vanguard Group — already the world’s largest money managers — are less than a decade from managing a total of $20 trillion, according to Bloomberg News calculations."

Hogg already has experience in leading a large-scale political boycott against a prominent National Rifle Association supporter.

"Hogg led a successful advertiser boycott of Fox television's Laura Ingraham's show last month after Ingraham publicly mocked his college acceptances," CNBC explained. "BlackRock and Vanguard, giant managers of exchange traded funds and other passive-style investments, are the biggest owners of publicly traded firearms makers like Sturm Ruger and American Outdoor Brands."

American Outdoor Brands is the parent company of Smith & Wesson Corp.

Hogg is also one of the leaders of a nationwide school walkout being organized for Friday.