Lennar and First Solar are downgraded, while AstraZeneca is upgraded.
First Solar gets both upgraded and downgraded.
The company's global restructuring efforts resonate with investors.
Stocks rise as the IMF raises its view on US and global growth prospects.
First Solar is downgraded to 'neutral,' and Trina Solar is upgraded to 'buy.'
These stocks have taken a tumble during a positive period for the markets.
Despite opposition, the German government is implementing plans to cut subsidies by 30%, followed by another round of cuts in May.
Some of the stocks that received the most short interest last year have posted strong gains in 2012.
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