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 cell phone distributor Brightpoint (Nasdaq: CELL) are shining even brighter this morning, up 10% after getting a nod from the friendly analysts at Citigroup.

So what: Musing on the implications of yesterday's Justice suit against AT&T (NYSE: T), Citi says Brightpoint could be a big winner if AT&T is forbidden to acquire T-Mobile.

Now what: Citi hedges that there's no guarantee the Uncle Sam will trump Ma Bell. But, if it does, that would suggest Brightpoint will keep on selling cells to T-Mobile stores -- and enjoy higher revenues than it will if AT&T wins its prize.The downside to all this? Now you, the Brightpoint investor, have one more thing to worry about -- if the U.S. loses its lawsuit, and AT&T does succeed in buying T-Mobile, you can expect Citi will re-downgrade your stock.

How will this story play out? Add Brightpoint to your Watchlist and find out.