Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.
What: Shares of mortgage insurer MGIC Investment
So what: The stock plunged more than 20% last week as head-to-head rival PMI Group
Now what: MGIC has a somewhat more stable balance sheet than PMI Group, but nowhere near the cash reserves of third musketeer Radian Group
Interested in more info on MGIC Investment? Add it to your watchlist.