Analyst upgrades:

• Oppenheimer upgraded OceanFreight (NASDAQ:OCNF) to Perform from Underperform on valuation and a lack of negative catalysts following the recent weakness.
  
• UBS raised Micron (NYSE:MU) to Buy from Neutral citing supply cuts which should improve prices. The target remains $5.
  
• Jesup & Lamont upgraded Atlas Air (NASDAQ:AAWW) to Buy from Hold is positive on the company's 20 year blocked space agreement with DHL and expects the stock to continue higher.
• AK Steel (NYSE:AKS) was added to Goldman's Conviction Buy List and upgraded to Buy from Neutral.
  
• Goldman also upgraded Northern Trust (NASDAQ:NTRS) to Buy from Neutral.
  
• Digital River (NASDAQ:DRIV) was upgraded to Hold from Sell at Stanford.

Analyst downgrades:

• Stephens downgraded shares of Titan Machinery (NASDAQ:TITN) after their survey of farmers indicated declining sales of agricultural equipment. The firm lowered their target to $19 but believes Titan Machinery's long-term growth story remains intact.
  
• Jefferies downgraded Helen of Troy (NASDAQ:HELE) and Blyth (NYSE:BTH) to Underperform from Hold as they believe the further deterioration in the U.S. consumer macro environment could pressure near-term results. The firm lowered its target on Helen of Troy to $13 from $16.50 and on Blyth to $5.50 from $8.
  
• UBS cut Indevus (NASDAQ:IDEV) to Neutral from Buy and lowered its target to $5.50 from $5 following the acquisition offer by Endo Pharmaceuticals (NASDAQ:ENDP).
• AECOM Tech (NYSE:ACM) was lowered to Equal Weight from Overweight at Morgan Stanley.
  
• Amerisafe (NYSE:AMSF) was downgraded at Oppenheimer to Perform from Outperform.
  
• Tractor Supply (NASDAQ:TSCO) was cut to Neutral from Buy at Piper Jaffray.

Analyst initiations:

• KeyBanc initiated Urban Outfitters (NASDAQ:URBN) with a Buy rating and $22 target. The firm believes the Urban Outfitters and Antropologie divisions are under penetrated and have visible growth.
  
• Kaufman Bros. started SuccessFactors (NASDAQ:SFSF) with a Hold rating and $7 target and believes the current demand backdrop could be worse than reflected in current consensus estimates.
  
• CarMax (NASDAQ:KMX) was initiated at Baird with a Neutral rating and $10 target. The firm is impressed with CarMax's business model but does not see a way around the near-term economic headwinds.
• Manulife Financial (NYSE:MFC) and Sunlife Financial (NYSE:SLF) were assumed with Equal Weight ratings at Morgan Stanley.
  
• Oppenheimer started Pacific Sunwear (NASDAQ:PSUN) with a Perform rating.
  
• Kite Realty Trust (NYSE:KRG) was initiated with a Buy rating at Janney Montgomery.

Here are some highlights from this past week's earnings coverage from BloggingStocks:

• Best Buy Inc. (NYSE: BBY) beat Q1 estimates as consumers spent their government stimulus checks.
• Carnival Corp. (NYSE: CCL) posted better than-expected Q2 results but offered cautious Q3 guidance.
• Cyberonics Inc. (NASDAQ: CYBX) beat Q4 expectations and offered full-year guidance.
• FactSet Research Systems (NYSE: FDS) had better-than-expected Q3 results and 500 new subscribers.
• General Mills Inc. (NYSE: GIS) raised its full-year guidance, sending shares up near the 52-week high.
• Goldman Sachs Group Inc. (NYSE: GS) results beat the previous quarter and analysts' estimates.
• John Wiley & Sons Inc. (NYSE: JW.A) doubled its Q4 earnings due to an acquisition.
• Life Partners Holdings Inc. (NASDAQ: LPHI) lifted its Q1 outlook after "best quarter" in company history.
• Lindsay Corp. (NYSE: LNN) Q3 profits nearly doubled, but the share price plunged anyway.
• Meade Instruments Corp. (NASDAQ: MEAD) narrowed its full-year net loss due to restructuring.
• Pall Corp. (NYSE: PLL) beat Q1 expectations on sales growth that was broadly based across markets.
• Titan Machinery Inc. (NASDAQ: TITN) beat Q1 estimates on strong demand for agricultural equipment.
• Vermont Pure Holdings Ltd. (AMEX: VPS) posted strong Q2 results despite a bad debt write-off.
• Western Union Co. (NYSE: WU) said 2008 profits would beat estimates and announced share buyback.

More earnings highlights from this week: Morgan Stanley, FedEx, Ford, GE, Circuit City and others

Titan Machinery (NASDAQ: TITN) owns and operates one of the largest networks of full service agricultural and construction equipment stores in North America. The chain includes 48 dealerships in North Dakota, South Dakota, Minnesota, Iowa and Nebraska, each representing one or more of the CNH Global (NYSE: CNH) equipment brands. The firm sells new equipment, rents a range of machines and provides parts and repair services. Deere & Company (NYSE: DE) is a major competitor.

The company pleased investors earlier in the week, when it reported fiscal Q1 EPS of 24 cents and revenues of $152.6 million. Analysts had been looking for 13 cents and $119.6 million. Management also guided FY09 EPS to 86-91 cents (79 cent consensus) and FY09 revenues to $575-$625 million ($588.55M consensus). The CEO cited a strong agriculture economy and solid demand for large agricultural equipment in support of the favorable outlook.

Most of us would be thrilled to invest in a stock that doubles our money, but it certainly isn't easy to find these stocks. According to data provider Capital IQ, in the last year only 1.4% of 6,700 stocks trading on the U.S. exchanges were able to double their price.

BusinessWeek started hunting some of these potentially great stocks by asking fund managers to choose those firms expected to provide 100% returns in the next few years. Of course, the resulting list is by no means a sure thing, since major factors such as the ongoing credit crisis and challenging market conditions could affect results in unpredictable ways.

But let's look at some of the strategies used when picking high-potential stocks.

Mary Lisanti, portfolio manager at the Adams Harkness Small Cap Growth Fund, focuses on young companies in the small-cap segment. She points to stocks like Rubicon Technology (NASDAQ: RBCN) and Titan Machinery Inc. (NASDAQ: TITN), saying that investors can have a big advantage when they recognize potential before the market does.

All it takes is some news to make you realize the risk involved in smallcap investing. That news came in the form of a horrific earnings report last night from Origin Agritech (NASDAQ: SEED), showing revenues and margins decreasing along with guidance that was more than 50% below the estimates of the one analyst that covers the company.

I often advise against trusting any company whatsoever, but it's rare that one lets investors down so greatly. I had no position in the stock, but along with Converted Organics (NASDAQ: COIN) and Titan Machinery (NASDAQ: TITN), I profiled Origin back in January as an up and coming agriculture stock. Since then, two of those three stocks have broken out to new highs in a similar fashion to this hot sector's leaders like Potash Corp. of Saskatchewan (NYSE: POT), Mosaic (NYSE: MOS), Monsanto (NYSE: MON) and Agrium Inc. (NYSE: AGU).

Performance aside, those billion dollar behemoths are established companies, with global investors and brands, while these new kids on the block are the exact opposite. Plagued by having few products, fund raising problems and debt issues, this 50% shortfall exemplifies just one of the many issues with which small-cap companies struggle. I mean they are really fighting for lives! And that's why they are priced the way they are and derided by Wall Street.