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

Radius Health, Inc. (symbol: RDUS) was one of the worst losers of the
trading day today (2016-01-21), losing -13.28%. The number of shares that
changed hands was 1,676,914, or about 2 times the average daily volume in
the stock.
The closing price was $33.75, amounting to a market cap of $1,450,000,000,
about -60.13% off the highest price in the last 12 months. The stock has
been trading at a range between $33.59 and $84.64.
RDUS is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2014.