Why 3D Systems, Stratasys, and ExOne Stocks All Popped Today

3D printer maker 3D Systems (NYSE: DDD) rocked the stock market last week, preannouncing a huge revenue beat for its fiscal fourth quarter and watching its stock price double overnight in response.

After letting the stock coast higher for a few days on that news, investors began taking profits earlier this week -- but now they're back for a second bite at the apple, and 3D Systems shares are skyrocketing again, up 23.5% as of 3 p.m. EST.

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Source Fool.com