$VSAR is one of biggest winner #stocks today. read more:

Versartis, Inc. (symbol: VSAR) was one of the biggest winners of the
trading day today (2016-12-16), gaining 11.65%. The number of shares that
changed hands was 535,977, or about 3.0 times the average daily volume in
the stock.
The closing price was $14.85, amounting to a market cap of $516,710,000,
about -2.3% off the highest price in the last 12 months. The stock has been
trading at a range between $6.17 and $15.2.
VSAR is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2014.