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

Rovi Corporation (symbol: ROVI) was one of the biggest winners of the
trading day today (2015-12-23), gaining 29.16%. The number of shares that
changed hands was 9,426,195, or about 5.5 times the average daily volume in
the stock.
The closing price was $14.66, amounting to a market cap of $1,210,000,000,
about -44.55% off the highest price in the last 12 months. The stock has
been trading at a range between $8.01 and $26.44.
ROVI is in the Multi-Sector Companies industry, part of the Miscellaneous
sector.