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

Quidel Corporation (symbol: QDEL) was one of the biggest winners of the
trading day today (2015-10-29), gaining 17.65%. The number of shares that
changed hands was 1,570,438, or about 6.2 times the average daily volume in
the stock.
The closing price was $20.4, amounting to a market cap of $683,930,000,
about -30.57% off the highest price in the last 12 months. The stock has
been trading at a range between $17.16 and $29.38.
QDEL is in the Biotechnology: In Vitro & In Vivo Diagnostic Substances
industry, part of the Health Care sector.