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

Plantronics, Inc. Common Stock (symbol: PLT) was one of the worst losers of
the trading day today (2016-02-02), losing -27.28%. The number of shares
that changed hands was 2,521,776, or about 14 times the average daily
volume in the stock.
The closing price was $32.55, amounting to a market cap of $1,090,000,000,
about -44.58% off the highest price in the last 12 months. The stock has
been trading at a range between $32.13 and $58.73.
PLT is in the Telecommunications Equipment industry, part of the Public
Utilities sector. It first went public in 1994.
Looking at its valuation, the stock is now trading at 13.57 times earnings.