There's a straightforward way to find out if gun stocks are in your retirement fund RGR, AOBC, VSTO

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Investors are scrutinizing their ownership of gun stocks following the mass shooting in Parkland, Florida.

Passive index funds, which power many retirement plans, are the largest shareholders in America's three major gunmakers, according to Morningstar.

About two out of every three dollars invested in small-cap funds have exposure to gun stocks, Morningstar found. The three gunmakers are small-cap stocks companies with a total market value of roughly 300 million to 2 billion .

Morningstar has published a long list of funds that own any of the three gun manufacturers.

Investors are scrutinizing their ownership of gun stocks following the mass shooting in Parkland, Florida on February 14.

BlackRock, the world's largest asset manager, said Friday it was exploring ways to offer index funds — single investment products that simultaneously buy several stocks — that exclude gun manufacturers and retailers.See the rest of the story at Business InsiderNOW WATCH: Elon Musk explains the one thing that went wrong with SpaceX's Falcon Heavy flightSee Also:There's a straightforward way to find out if gun stocks are in your retirement fundObama made one of history's greatest stock market calls 9 years agoJPMORGAN: The stock market's most trusted strategy is on its last legsSEE ALSO: Traders are making a fortune betting against gun stocks

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