Why Shares of 3D Systems Plunged 17.1% on Monday

Shares of 3D printing company 3D Systems (NYSE: DDD) fell as much as 17.1% in trading Monday after a negative note came out from an analyst. The culprit of the move was William Blair analyst Brian Drab, who questioned the rally 3D Systems' shares have experienced over the past month. Shares were up 46% in a month going into today, and it appears that a Tesla job posting related to 3D printing and a strong earnings report from Align Technologies had growth stock investors piling into the stock.