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: After initially trading down last night post-earnings, Polycom (Nasdaq: PLCM) shares popped 10% this morning in response to an analyst upgrade from Wells Fargo.

So What: According to our analyst tracker on Motley Fool CAPS, Wells is one of the better bankers out there -- but it's still only right on its picks about half the time.

Now What: Even Wells admits that Polycom faces stiff competition from the likes of Cisco (Nasdaq: CSCO), which just introduced a line of home videoconferencing equipment; Google (Nasdaq: GOOG) and its new "online phone" function; and of course, the impending IPO of Skype, now spun off from eBay (Nasdaq: EBAY). At a price nearly 26 times the size of its annual free cash flow, and a growth rate still stuck in the mid-teens, I wouldn't bet on the house of Wells being right about Polycom.

More likely, investors were right the first time -- and should put Polycom on hold.

Want to put Polycom info on speed-dial? Add it to your watchlist.