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

Sotheby's (symbol: BID) was one of the biggest winners of the trading
day today (2016-12-16), gaining 7.74%. The number of shares that changed
hands was 2,783,323, or about 5.1 times the average daily volume in the
stock.
The closing price was $41.35, amounting to a market cap of $2,190,000,000,
about -3.07% off the highest price in the last 12 months. The stock has
been trading at a range between $18.86 and $42.66.
BID is in the Business Services industry, part of the Miscellaneous sector.
It first went public in 1988.