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

MGIC Investment Corporation Com (symbol: MTG) was one of the worst losers
of the trading day today (2016-01-21), losing -12.88%. The number of shares
that changed hands was 19,757,555, or about 4 times the average daily
volume in the stock.
The closing price was $6.36, amounting to a market cap of $2,160,000,000,
about -45.73% off the highest price in the last 12 months. The stock has
been trading at a range between $6.35 and $11.72.
MTG is in the Property-Casualty Insurers industry, part of the Finance
sector. It first went public in 1991.
Looking at its valuation, the stock is now trading at 2.45 times earnings.