Markets rose substantially at the end of the day, in part led by the strong earnings reports from 5 of 30 DJIA components this morning alone. This was despite the discussions of the risks of the US's Triple-A rating, another drop in home prices, and despite weekly jobless claims heading higher.

Here were today's unofficial closing bell levels:

Dow 10,081.31 +131.95 (1.33%)
S&P 500 1,092.91 +11.51 (1.06%)
Nasdaq 2,165.29 +14.56 (0.68%)

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Analyst upgrades:

• Citigroup upgraded shares of Akamai (NASDAQ: AKAM) to Buy from Hold following the company's Q4 results as they believe fundamentals are stabilizing. The firm raised their target price to $22 from $12.
  
• Baird upgraded Theravance (NASDAQ: THRX) to Outperform from Neutral. The firm said the company looks poised to realize the two-product success necessary to drive profitability, and Horizon will likely play a role in succeeding $7B+ Advair. Note that last night Theravance/Glaxo (GSK) reported positive results for Horizon.
  
• RBC Capital said Aeterna Zentaris (NASDAQ: AEZS) is on the cusp of a Cetrorelix deal and has turned more positive on shares. Shares were upgraded to Outperform from Sector Perform.
  
• Marvell Tech (NASDAQ: MRVL) was upgraded to Buy from Neutral at Goldman and added to the firm's Conviction Buy List.
  
• Sangamo BioSciences (NASDAQ: SGMO) was raised to Buy from Neutral at Merriman.
  
• Arthur J. Gallagher (NYSE: AJG) was upgraded at Piper Jaffray to Buy from Neutral.

"Harvest Energy Trust (NYSE: HTE) is exactly what we love – a company with incredible upside and hefty 'dividends' that's being ignored byWall Street," says Keith Fitz-Gerald.

The editor of Money Morning explains, "But the stock is not being ignored by the company's executives. In fact, insiders are buying like crazy. And while this by itself doesn't guarantee higher prices, it's an important indicator of things to come, especially when oil prices are destined to increase in the coming years.

"Harvest Energy is located in Calgary and functions as a Canadian royalty trust, which means its profits are funneled back to investors in the form of 'distributions.' Harvest engages in the exploration, development, production, and sale of petroleum, natural gas, and natural gas liquids in western Canada.

"And the best part is, it's been tamped down in the last two quarters. You see, management has reduced its distribution by 21%, citing volatile energy prices and the new tax rules set to take effect in Canada in 2012. It also carries a lot of debt after having consolidated purchases of other oil and gas trusts and large private producers over the last two years. The company also purchased a refinery complex – and that didn't come cheap.

"Now here's where things get really good: Plain and simple, Harvest is sitting on oil – a lot of it. Large multi-million barrel reserves, with an estimated 9.3 years of proven and probable reserves using conventional extraction techniques. It's also sitting on over 1 billion barrels of untapped oil sands.

"Oil is moving back up, and energy stocks look strong as we head into the final months of 2007," says Mark Skousen, who sees opportunities in the energy sector for both growth investors and income investors.

In his The Turnaround Trader, he looks at Patterson-UTI Energy Inc. (NASDAQ: PTEN), an independent oil and natural gas operator that provides pumping services and remedial work on existing wells in North America. He says, "Patterson-UTI Energy has been in a two-year bear market.

"Two years ago, the stock topped out at $38 a share. This year, it reached a high of $28. In the most recent quarter, its revenues and earnings fell unexpectedly by 18%. But Patterson-UTI Energy is sporting a 25% profit margin and now is selling at only six times current earnings.

"The stock is deeply undervalued and easily could move back up to $28 a share or higher. Zacks Investment Research predicts the stock will reach $29 this year, 'well within historical trading range.' Let's buy Patterson-UTI Energy and set a protective stop of $18 a share. For those willing to take a gamble, consider buying the January $30 calls."

What are the best energy investments for long-term investors? To answer this question, I surveyed 20 of the nation's leading financial newsletter advisors to find their current favorite ideas in the energy sector.

Interestingly, the advisors see the best opportunities in areas well beyond traditional oil firms; indeed, no one included in this report chose a major integrated oil company. Rather, the advisors have shown a preference for various oil services sectors, non-oil energy sources, and developing alternative technologies.

Some focus on areas such as deep-sea operations with Diamond Offshore Drilling Inc. (NYSE: DO), Transocean Inc. (NYSE: RIG) and Oceaneering International (NYSE: OII), while others look toward oil shippers such as Nordic American Tanker Shipping (NYSE: NAT) and refiners such as Valero Energy Corp. (NYSE: VLO).

Others chose companies that make specific products needed by the oil & gas industries such as NATCO Group Inc. (NYSE: NTG), which makes a wide range of oil & gas processing systems; Dresser-Rand Group Inc. (NYSE: DRC), a maker of control systems; Gardner Denver Inc. (NYSE: GDI), which makes compressor and fluid transfer systems; Tenaris (NYSE: TS), a maker of pipes and tublar products and Schlumberger Ltd. (NYSE: SLB), the largest and most diversified of the oil services companies.