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 Chinese solar manufacturer Trina Solar (NYSE: TSL) jumped 10% briefly this morning after the company got an analyst upgrade.

So what: Bank of America/Merrill Lynch upgraded Trina Solar all the way from underperform to buy on the improvements in the solar market. The bump didn't last long, as Trina's shares fell to a slight gain as trading went on today.

Now what: We don't like to take analyst upgrades too seriously, but this does show how seriously investors are taking the rebound in solar demand. Germany, China, and the U.S. have driven solar demand higher at the end of 2011 and beginning of 2012, which should lead to strong performance for solar manufacturers. I think Trina Solar is one of the strongest manufacturers and should benefit from this rebound as the year goes on.

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