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

Iridium Communications Inc (symbol: IRDMB) was one of the worst losers of
the trading day today (2016-09-06), losing -13.05%. The number of shares
that changed hands was 27,523, or about 41 times the average daily volume
in the stock.
The closing price was $272.86, amounting to a market cap of
$26,090,000,000, about -22.04% off the highest price in the last 12 months.
The stock has been trading at a range between $236.56 and $350.0.
IRDMB is in the Telecommunications Equipment industry, part of the Consumer
Durables sector.