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

Sprint Corporation Common Stock (symbol: S) was one of the worst losers of
the trading day today (2016-01-25), losing -12.2%. The number of shares
that changed hands was 40,762,688, or about 2 times the average daily
volume in the stock.
The closing price was $2.52, amounting to a market cap of $10,000,000,000,
about -53.76% off the highest price in the last 12 months. The stock has
been trading at a range between $2.18 and $5.45.
S is in the Telecommunications Equipment industry, part of the Public
Utilities sector. It first went public in 2013.