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

Credit Suisse Group American De (symbol: CS) was one of the worst losers of
the trading day today (2016-05-31), losing -4.34%. The number of shares
that changed hands was 4,212,482, or about 1 times the average daily volume
in the stock.
The closing price was $13.68, amounting to a market cap of $26,630,000,000,
about -54.38% off the highest price in the last 12 months. The stock has
been trading at a range between $12.56 and $29.99.
CS is in the Investment Bankers/Brokers/Service industry, part of the
Finance sector.