A number of analysts covering Tractor Supply have raised their price targets for the specialty retailer's shares, which already are up more than 40 percent this year. Joan Storms at Wedbush Securities sees the stock climbing to $112 on the back of the powerful combination of strong execution and continued growth potential. And Brent Rystrom at Feltl now rates Tractor Supply a 'buy' and has lifted his target to $105 from $91.

Two researchers following Corrections Corp. of America have recently gone in different directions on the prison operator. At Barclays Capital, Manav Patnaik has lifted his price target to $33 from $30 and reiterated his 'overweight' rating. But over at First Analysis, Todd Van Fleet sees the steady 2012 climb of CCA stock (Ticker: CXW) as a reason to lighten up. He has lowered the stock to 'equalweight' from 'overweight.'

Avondale Partners analyst Richard Close sees very good things ahead for HealthStream following the health education provider's $55 million stock offering. He has raised his price target for HealthStream shares (Ticker: HSTM) to $20 from $17.50 and says revenues — especially patient surveys — and earnings could surprise to the upside in 2012. That should help the stock, which closed Tuesday trading at $16.16, reach valuations similar to those of other health care IT and technology learning names.

Frank Sparacino at First Analysis isn't quite so bullish, though: He has lowered his rating to 'equal weight' from 'overweight' and is sticking to his $16 price target.