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 Amazon.com (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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Fool contributor Evan Niu owns shares of Amazon.com, but he holds no other position in any company mentioned. Click here to see his holdings and a short bio. The Motley Fool owns shares of Amazon.com and Microsoft. Motley Fool newsletter services have recommended buying shares of Microsoft and Amazon.com. Motley Fool newsletter services have recommended creating a bull call spread position in Microsoft. Try any of our Foolish newsletter services free for 30 days. 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.