"Considering that the 73 utility stocks in the S&P 1500 Index combine to represent just 4% of the index's market value, they certainly occupy a big place in the hearts of investors," notes Richard Moroney.

The editor of Dow Theory Forecasts -- a newsletter that has been published for nearly 60 years -- explains, "Here, we offer a diversified 12-stock utility portfolio, as well as our top utility choice for investors who only wish to buy one stock in the sector.

MOST NOTEWORTHY: Amazon.com (AMZN), Luminent Mortgage (LUM), Whole Foods (WFMI), Tenet Healthcare (THC) and Pediatrix Medical (PDX) were today's noteworthy upgrades:

• Bernstein upgraded Amazon.com (NASDAQ: AMZN) to Outperform from Market Perform, citing margins on 3rd party transactions that are close to eBay's (EBAY) and that the overseas merchants initiative will increase 3rd party units to 25% of sales. The move is expected to increase operating margins to 6.2% by 2011, above the previously expected improvement of 4.6% by the same time.

• JMP Securities said Luminent Mortgage's (NYSE: LUM) $64.9M emergency financing from Arco Capital may preserve some value for shareholders, and upgraded shares to Market Underperform from Sell.

• JP Morgan added Whole Foods (NASDAQ: WFMI) to its Focus List, and expects the Wild Oats (NASDAQ: OATS) acquisition to be a catalyst for shares.

• Deutsche Bank upgraded Tenet Healthcare (NYSE: THC) to Hold from Sell.

• Matrix USA raised Pediatrix Medical (NYSE: PDX) to Buy from Hold, citing valuation...

OTHER UPGRADES:

• AGL Resources (NYSE: ATG) and Atmos Energy (NYSE: ATO) were upgraded to Buy from Neutral at Calyon.

• Rowan Co (NYSE: RDC) was upgraded to Outperform from Peer Perform at Bear Stearns.

• Goldman raised O'Reilly Automotive (NASDAQ: ORLY) to Buy from Neutral.

• BMO Capital upgraded General Mills (NYSE: GIS) to Outperform from Market Perform.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).