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 solar efficiency leader SunPower (Nasdaq: SPWRA) jumped 10% today in a very curious move.

So what: SunPower hasn't released any news, and the move is especially odd because most solar stocks are down but SunPower and Hanwha SolarOne (Nasdaq: HSOL) are up significantly. The only analyst movement today was Auriga lowering SunPower's price target to $12.50 and Brigantine upgrading shares to a hold rating.

Now what: I would love to take credit since I did call SunPower the best stock in solar just yesterday, but I have the sneaking suspicion I don't hold that kind of sway with the market. This could be something of a dead cat bounce, but it certainly isn't a rallying cry for the solar sector. For now I'll stick to my analysis that SunPower is a good buy for investors but brush off today's bounce as a wild move from the market.

Of course, there's always the possibility that traders have gotten a hold of some news before it's released, but I would only be speculating and that isn't a great reason to buy a stock.

Interested in more info on SunPower? Add it to your watchlist by clicking here.