$DDD is one of biggest losers #stocks today. read more:

3D Systems Corporation Common S (symbol: DDD) was one of the worst losers
of the trading day today (2016-07-18), losing -8.36%. The number of shares
that changed hands was 7,845,992, or about 2 times the average daily volume
in the stock.
The closing price was $13.48, amounting to a market cap of $1,510,000,000,
about -31.78% off the highest price in the last 12 months. The stock has
been trading at a range between $6.0 and $19.76.
DDD is in the Computer Software: Prepackaged Software industry, part of the
Technology sector.