Analyst Upgrades

• Citigroup (C) to outperform from market perform at Bernstein.
• Cubist Pharma (CBST) to outperform from neutral at RW Baird.
• Pentair (PNR) to buy from hold at Citigroup.
• Heritage Financial (HFWA) to outperform from market perform at Keefe Bruyette.
• SL Green Realty (SLG) and Digital Realty (DLR) to market perform from underperform at FBR Capital.
• MGM Resorts (MGM) to neutral from Sell at Janney Capital.
• Ciena (CIEN) to buy from neutral and Olin (OLN) to buy from underperform at BofA/Merrill.
• Mellanox (MLNX) to overweight from equal weight at Barclays.
• ConocoPhillips (COP) and Canadian Natural (CNQ) to overweight from neutral at JPMorgan.
• IDEX (IEX) to outperform from perform at Oppenheimer.
• Taiwan Semiconductor (TSM) to buy from hold at Deutsche Bank.
• Ctrip.com (CTRP) to positive from neutral at Susquehanna.
• Linear Technology (LLTC) and Analog Devices (ADI) to hold from sell at Auriga.
• Quicksilver (KWK) to outperform from market perform at BMO Capital.

This post is part of Japan: A Special Report for Investors.

"Japan's tsunami has struck worldwide," says Richard Moroney, the editor of Dow Theory Forecasts, which has maintained a model portfolio of blue chip stocks for over 50 years.

Here, he reviews a number of the top buy recommendations in the newsletter's portfolios to determine the potential risk posed by the recent tragic developments in Japan.

Stocks cited as "Focus List Buys" are are those issues that the service expect to significantly outperform the market over the next 12 months.

Analyst Upgrades

• Parker-Hannifin (PH) to buy from hold at Deutsche Bank.
• JDSU (JDSU) to buy from hold at Citigroup.
• Noble Corp. (NE) to overweight from neutral at JPMorgan.
• Cerner (CERN) to buy from hold at Auriga.
• Cintas (CTAS) to outperform from neutral at RW Baird.
• American States Water (AWR) to buy from hold at Brean Murray.
• National Semiconductor (NSM) and Texas Instruments (TXN) to positive from neutral at Susquehanna.
• Lululemon (LULU) to buy from hold at ThinkEquity.
• DuPont Fabros (DFT) to top pick from outperform at RBC Capital.

Texas Instruments (TXN) March put option implied volatility is at 26, April is at 28, near its 26-week average, according to Track Data, suggesting non-directional price movement into Tuesday's post-market Q1 mid-quarter update.

Vail Resorts (MTN) volatility elevated into results. MTN March put option implied volatility is at 45, April and July is at 39, above its 26-week average of 37, according to Track Data, suggesting larger price movement into expected Q2 results on March 10.

Update is by Stock Specialist Paul Foster of theflyonthewall.com.

Analyst Upgrades

• SINA (SINA) to overweight from neutral at Piper Jaffray.
• Texas Instruments (TXN), ON Semiconductor (ONNN), Xilinx (XLNX) and Valassis (VCI) to overweight from neutral at JPMorgan.
• Salesforce.com (CRM) to buy from hold at Canaccord.
• Peet's Coffee (PEET) to buy from neutral at Janney Capital.
• Invesco Mortgage (IVR) to overweight from equal weight at Barclays.
• BTU International (BTUI) to buy from hold at Wunderlich.
• Coca-Cola Femsa (KOF) to overweight from neutral at HSBC.
• Chipotle (CMG) to market perform from underperform at Morgan Keegan.

"Buoyed by strong operating momentum, the technology sector earns high marks in our Quadrix® stock- rating system," says Richard Moroney.

The editor of Dow Theory Forecasts explains, "Our favorite picks in the tech sector -Altera (ALTR), Apple (AAPL), IBM (IBM) and Texas Instruments (TXN) - share some favorable qualities.

➤ December-quarter results: All four topped consensus estimates, producing double-digit growth in per- share profits. Revenue also exceeded expectations.

Analyst Upgrades

• NYSE Euronex (NYX) to conviction buy from neutral at Goldman.
• General Dynamics (GD) to buy from hold at Citigroup.
• Deere (DE), Parker-Hannifin (PH) and ExlService (EXLS) to overweight from neutral at JPMorgan.
• Aflac (AFL) to outperform from market perform at FBR Capital.
• Wynn Resorts (WYNN) to buy from neutral at Janney Capital.
• Amdocs (DOX) to buy from neutral at UBS.
• Juniper (JNPR) to buy from hold at ThinkEquity.
• Rudolph Tech (RTEC) and KLA-Tencor (KLAC) to perform from underperform at Oppenheimer.
• Hershey (HSY) and Pinnacle Entertainment (PNK) to outperform from market perform at Wells Fargo.
• Spirit AeroSystems (SPR) to equal weight from underweight at Morgan Stanley.
• Micron (MU) to outperform from neutral at RW Baird.

For years Microsoft (MSFT) was the tech leader. Then, Google (GOOG) came along and Microsoft missed the entire search engine revolution. But Microsoft still dominated in software. Then came Apple (AAPL) with its iPod, iPhone, and iPad. Again, Microsoft missed the small device revolution.

The Wall Street Journal reports that now Microsoft is playing catch-up again. With its next operating system it will use low-powered chips similar to those Apple uses.

Analyst Upgrades

• Cisco (CSCO) to outperform from perform at Oppenheimer.
• Cognizant (CTSH) to buy from neutral at Goldman.
• Polypore (PPO) to outperform from neutral at RW Baird.
• Elan (ELN) to buy from neutral at UBS.
• Millicom (MICC) and NuStar GP Holdings (NSH) to overweight from equal weight at Morgan Stanley.
• Teekay LNG (TGP) to equal weight from underweight at Morgan Stanley.
• American Railcar (ARII) to outperform from market perform at Morgan Keegan.
• Texas Instruments (TXN) to buy from neutral at Sterne Agee.

"Texas Instruments (TXN) was roughed up pretty badly in 2008 and 2009. Profits fell sharply for this semiconductor giant, as did the stock price," says dividend reinvestment plan specialist Chuck Carlson.

The editor of The DRIP Investor explains, "The shares plummeted from nearly $40 per share in 2007 to $13 in early 2009. The stock has come roaring back from the 2009 lows, paced by impressive rebounds in sales and profits.

"For 2010, Texas Instruments should post record per-share profits in the vicinity of $2.47 per share. Based on that estimate, the stock seems cheap at less than 12 times earnings.

Texas Instruments (TXN) has done well over the last month or so. As can be seen from the chart, the stock engaged in a bit of a rally. Yesterday, the shares closed the regular session at $28.98, not far from the 52-week high of $29.19. And it should be noted that the 52-week high was hit during the intraday portion of the day.

So, we've got some strength to consider here. Now that the third-quarter numbers are out, should investors be taking a look at the stock as a potential buy?