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

Natl Bk Greece American Deposit (symbol: NBG) was one of the worst losers
of the trading day today (2015-11-24), losing -20.0%. The number of shares
that changed hands was 76,542,847, or about 5 times the average daily
volume in the stock.
The closing price was $0.2, amounting to a market cap of $706,560,000,
about -91.97% off the highest price in the last 12 months. The stock has
been trading at a range between $0.16 and $2.49.
NBG is in the Commercial Banks industry, part of the Finance sector.