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 optical networking equipment maker Finisar
So what: There's high volume in the sell-off, which suggests profit taking by large institutional owners of the stock. Wellington Management, administrator of the Vanguard family of funds, and BlackRock
Now what: Without any business cause for a sell-off, I'm loath to call this anything other than Mr. Market acting like, well, Mr. Market. Brocade Communications
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