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: Radian Group (NYSE: RDN) dropped 10% in intraday trading today after an analyst initiated coverage with a neutral rating.

So what: Radian's financial insurance helps homebuyers purchase homes more quickly with smaller down payments and protects lenders against loan default. Susquehanna initiated coverage of the stock today with a neutral rating.

Now what: Radian has not reported an annual profit since 2006, and its revenues are little more than half of what they were in 2008. Radian's stock has been getting hammered badly since January as weakness in the housing -- and mortgage -- market persists. There seems to be no clear bottom in sight, and neutral ratings on Wall Street are often code for sell.

Interested in more info on Radian? Add it to your watchlist by clicking here.

Fool contributor Cindy Johnson does not own shares of any company named above. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.