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 Advanced Micro Devices (NASDAQ:AMD) advanced by as much as 12% today on hopes  that its largest investor would help support the company if it needs to.

So what: Williams Financial Group analyst Cody Acree said that there is a good chance that Mubadala Development Co. would help provide financial support to the struggling chipmaker if AMD ran short on cash. Mubadala currently has an approximately 19% stake (including warrants) in the company, and it added another board seat in November.

Now what: Acree alluded to Mubadala as a "lender of last resort," implying that the investor would have little choice but to bail out AMD if it came down to it. AMD also said last week that it was planning on selling its facilities in Austin, Texas, to improve its cash position. Shares have been under heavy pressure in recent weeks, so a little bit of bullishness goes a long way toward sparking a rebound rally.

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Fool contributor Evan Niu, CFA, has no positions in the stocks mentioned above. The Motley Fool has no positions in the stocks mentioned above. Try any of our Foolish newsletter services free for 30 days. We Fools don't 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.