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

Navistar International Corporat (symbol: NAV) was one of the worst losers
of the trading day today (2016-05-04), losing -14.12%. The number of shares
that changed hands was 2,153,898, or about 1 times the average daily volume
in the stock.
The closing price was $12.35, amounting to a market cap of $1,010,000,000,
about -59.15% off the highest price in the last 12 months. The stock has
been trading at a range between $5.78 and $30.23.
NAV is in the Auto Manufacturing industry, part of the Capital Goods sector.