Stifel Nicolaus initiated coverage of 3 D Systems (NYSE:

) with a Buy rating this morning. The firm set their price target at $65 per share, a 22.23 percent premium to yesterday's closing price of 53.19. DDD has been a big underperformer so far this year, down nearly 38 percent year to date. Share of DDD are trading higher in pre-market activity, up 0.74 percent at 53.58.