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 Trina Solar (NYSE: TSL) are shining bright today, up by as much as 16% after receiving an analyst upgrade from Auriga.

So what: Auriga upgraded a slew of other solar players in kind, including SunPower (Nasdaq: SPWR), MEMC Electronic Materials (NYSE: WFR), Suntech Power (NYSE: STP), and Yingli Green Energy (NYSE: YGE). SunPower, MEMC, Trina, and Yingli all now carry buy ratings, while Suntech was only granted a hold rating.

Now what: MEMC was previously considered a hold while the rest were considered sells, so the upgrade shows a stark contrast to Auriga's prior ratings. All of the upgraded shares are seeing healthy upside today amid a broadly upbeat day, but Trina is enjoying the biggest gains. Auriga also bumped its price targets on all of the companies accordingly, raising Trina's from $3.50 to $9, which represents a 30% premium to yesterday's closing price of $6.91.

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

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