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

Intrexon Corporation Common Sto (symbol: XON) was one of the worst losers
of the trading day today (2015-12-31), losing -4.29%. The number of shares
that changed hands was 1,216,422, or about 1 times the average daily volume
in the stock.
The closing price was $30.15, amounting to a market cap of $3,510,000,000,
about -56.59% off the highest price in the last 12 months. The stock has
been trading at a range between $25.23 and $69.45.
XON is in the Biotechnology: Commercial Physical & Biological Resarch
industry, part of the Health Care sector. It first went public in 2013.