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 Research In Motion (Nasdaq: RIMM) are seeing a rare sight today: healthy gains upward of 13%. The jump is due to hopes and speculation of a possible buyout.

So what: Two separate reports from The Wall Street Journal and Reuters stoked speculation that a white knight may arrive and save investors from their misery. Both reports said no formal offers have been made, but the mere thought of a rescue is enough to make shareholders giddy with glee.

Now what: Reuters pegged (Nasdaq: AMZN) as a potential suitor, saying it had even gone as far as to hire investment bankers to weigh its options. The WSJ said Microsoft (Nasdaq: MSFT) and Nokia (NYSE: NOK) were considering a "joint bid" for the flailing BlackBerry maker. It doesn't look like it's happening anytime soon, if at all, but that hasn't stopped investors from throwing a premature party.

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