"Despite the stomach churning volatility that we've seen recently with Towerstream (TWER), nothing has really changed regarding the firm's bullish outlook," says tech expert Paul McWilliams.

The editor of Next Inning newsletter explains, "Towerstream provides enterprise WiMax broadband services. Its base model is growing fairly steadily and should continue to do so going forward.

"Since there is very little new capital cost that has to be invested in this model, the marginal profit from this growth is very high. Therefore, time is on our side when it comes to making money from the base model.

Analyst Upgrades

• JPMorgan upgraded Coca-Cola (KO) to overweight from neutral due to valuation and expectations that developed market volume should improve. The firm raised its target price for shares to $66.
• BB&T upgraded Nordson (NDSN) to buy from hold and has an $82 price target on the stock. The firm believes certain drivers of Nordson's Advanced Tech unit are becoming more secular vs. cyclical and that the company's EBIT margins can go higher.
• Credit Suisse upgraded Embraer (ERJ) to outperform from underperform, citing the positive announcements from the Famborough Air Show. The firm raised its price target to $37 from $21.
• Universal Health (UHS) was upgraded to outperform from sector perform at RBC Capital.
• Mead Johnson (MJN) was upgraded to conviction buy from buy at Goldman.
• Coventry Health (CVH) was upgraded to outperform from market perform at Leerink.

MOST NOTEWORTHY: Penske Automotive, CarMax, Towerstream, Solera and Northstar were today's noteworthy initiations:

• Kevin Dann initiated shares of Penske Automotive Group Inc (NYSE: PAG) with a Buy rating and $25 target. The firm believes shares deserve a higher multiple given the company's reduced exposure to slower growing domestic brands combined with the increased penetration o luxury as a percentage of industry sales.
  
• CarMax Inc (NYSE: KMX) was also initiated at Kevin Dann with a Buy rating and $28 target, as they expect the multiple expansion to continue as confidence builds in the company's sales and expense strategy.
  
• Think Equities started shares of Towerstream Corporation (NASDAQ: TWER) with a Buy rating and $5 target and said the company is rapidly growing given robust demand fro high bandwidth services, market expansion, sales force growth, and higher ARPU services.
  
• Barrington believes Solera Holdings Inc (NYSE: SLH) is positioned to capture growth through technology adoption in claims processing by insurance companies, starting shares off with an Outperform rating and $27 target.
  
• Jefferies resumed coverage of Northstar Neuroscience Inc (NASDAQ: NSTR) with a Buy rating and $21 target, as they expect the company's Phase III EVEREST trial to yield positive positives, setting the stage for an FDA approval by Q109.

OTHER INITIATIONS:

• Friedman Billings started shares of IPG Photonics Corporation (NASDAQ: IPGP) with an Outperform rating and $28 target and added shares to its Top Picks List.
  
• The firm also resumed coverage of Rofin-Sinar Technologies Inc (NASDAQ: RSTI) with an Outperform rating and $92 target.
  
• ABN Amro started China Netcom Group Corporation (NYSE: CN) with a Hold rating and China Mobile Limited (NYSE: CHL) and China Unicom Limited (NYSE: CHU) with Buy ratings.
  
• UBS started RSC Holdings Inc (NYSE: RRR) with a Neutral rating.