This post is part of a special report, Top Picks for 2010, the 27th annual survey in which TheStockAdvisors.com asks the nation's leading advisors for their single favorite stock for the new year. See all 80 stocks listed here.

Jinpan International Limited (JST), a manufacturer of transformers, is the top pick for 2010 from Tracey Ryniec.

The value stock strategist for Zacks.com explains, "The company is positioned to benefit from the trillions of dollars of government stimulus around the world, as much of it is going into infrastructure.

Analyst upgrades:

• Citigroup upgraded Lennar (NYSE: LEN) to Buy from Hold as it believes the company's near-term liquidity profile is improved following the $400M debt issuance. The firm raised its target price to $12 from $11.
• Jefferies upgraded Rowan Companies (NYSE: RDC) to Buy from Hold as it believes jack-up drillers will continue to outperform deepwater names. The firm raised its target price to $27 from $20.
• Keefe Bruyette upgraded First Financial (NASDAQ: FFIN) to Market Perform from Underperform to reflect more positive loan data for the Texas banks. The firm raised its target price on shares to $44 from $38.
• MGM Mirage (NYSE: MGM) was upgraded to Overweight from Neutral at JP Morgan.
• Morgan Stanley (NYSE: MS) was upgraded to Outperform from Market Perform at JMP Securities.
• Brinker (NYSE: EAT) was upgraded to Overweight from Equal Weight at Barclays.