Barnes & Noble, the Gap, RadioShack, and Sears -- that may sound like the lineup at the local mall, but in fact they are just a few of the retailers scheduled to step into the earnings spotlight this week. Following last week's disappointing January retail sales numbers from the Commerce Department but strong fourth-quarter reports from Abercrombie & Fitch (ANF) and Nordstrom (JWN), the coming week will offer plenty more data on the sector for investors to mull over.

Walmart

Bentonville-based Walmart (WMT) offered free holiday shipping, closed its Moscow office and named a chief merchandising officer during its fourth quarter. Analysts surveyed by Thomson Reuters forecast earnings for that period to come to $1.31 per share, up from $1.17 in the same quarter of last year. The world's largest retailer also is expected to post revenues of $117.7 billion for the three months that ended in January. That's 3.5% more than a year earlier.

Winn-Dixie Stores (WINN) issued results for its fiscal second quarter on Monday after the bell. Today, the supermarket chain, which counts Walmart (WMT) as a related stock, is receiving a bid; at the time of this writing, the shares were higher by 2.5% to $6.98. Volume is above average.

The 52-week low for the equity is $5.95 while the 52-week high is $13.90. The one-year chart is not pleasant. Such a downturn in fortune doesn't make the company appealing.

Wal-Mart Stores, Inc (WMT) is the world's largest retailer, competing with companies like Target (TGT), Costco (COST), Amazon (AMZN) and Best Buy (BBY). Our price estimate for Wal-Mart stands at $65.42, which implies a premium to market price.

Analyst Upgrades

• Abercrombie & Fitch (ANF) to outperform from market perform at Wells Fargo.
• Trinity Industries (TRN) to buy from hold at BB&T.
• Cameron (CAM) to outperform from sector perform at RBC Capital.
• Expedia (EXPE) to positive from neutral at Susquehanna.
• Micron (MU) to buy from hold at Lazard Capital.

Analyst Upgrades

• Polo Ralph Lauren (RL) to neutral from underperform at BofA/Merrill.
• Sigma-Aldrich (SIAL) to outperform from market perform at Leerink.
• Petrobras (PBR) to overweight from equal weight at Barclays.
• Silvercorp Metals (SVM) to buy from neutral at UBS.
• PROS (PRO) to buy from hold at Jefferies.
• Power Integrations (POWI) and Monolithic Power (MPWR) to buy from neutral at Roth Capital.
• Diodes (DIOD) to outperform from neutral at RW Baird.
• Whole Foods (WFMI) to hold from sell at Hapoalim.
• Sinclair Broadcast (SBGI) to overweight from neutral at JPMorgan.
• Sappi (SPP) to outperform from neutral at Macquarie.
• Alpha Natural (ANR) to buy from hold at BB&T.
• Watts Water (WTS) to buy from hold at Brean Murray.

Tomorrow is a big day for Verizon (VZ) customers who have been waiting to get their chance to join the iPhone revolution, and we now learn that Wal-Mart Stores (WMT) will also be carrying the Verizon iPhone 4 at 600 retail stores across the nation.

As of today, when you visit Apple's (AAPL) website you are given the option to order an iPhone for use on either AT&T (T) or Verizon, with the price being the same for either option.

Analyst Upgrades

• Athenahealth (ATHN), Ensco (ESV), Pride International (PDE) and Sinclair Broadcast (SBGI) to outperform from market perform at Wells Fargo.
• CIRCOR (CIR) to buy from hold at BB&T.
• Urban Outfitters (URBN) to hold from sell at Citigroup.
• Shaw Group (SHAW) to buy from neutral at UBS.
• MGM Resorts (MGM) and Boyd Gaming (BYD) to buy from neutral, as well as Intrepid Potash (IPI) to neutral from underperform, at BofA/Merrill.
• Carlisle (CSL) to buy from neutral at SunTrust.

Perhaps it is the cynic in me, but I was not surprised to read this story about Wal-Mart Stores Inc. (WMT) from Bloomberg. The news outlet obtained an e-mail that was sent to Walmart managers instructing them to raise prices on an average of 1,800 types of toys per store. The managers were instructed to perform the price markups "as soon as possible" and were told that the price changes were "to better enable your store and the company to have a successful financial month."

Walmart stated that these price increases went into effect because temporary discounts on products (including toys) ended on November 30. Spokesman Ravi Jariwala, spokesman for Walmart, said in an e-mail, "Once a rollback ends, the item returns to its original everyday low price." That said, Eric Johnson director of the Center for Digital Strategies at the Tuck School of Business at Dartmouth noted that "In previous years Wal-Mart has come out and hammered everyone with unbelievably low toy prices ... They stepped away from that this year and after Thanksgiving their prices have crept back up."

Poor The Talbots, Inc. (TLB). Talk about a nasty drop. With about ninety minutes to go before the end of the trading day, the company's stock is down over 20% to $9.03. Volume is way, way above average. Fortunately, the price is still comfortably higher than the 52-week low of $6.81. But that might not be saying much at this point for shareholders.

The catalyst for the move was the third-quarter earnings report. According to The Wall Street Journal (subscription required), net profit from continuing activities on an adjusted basis came in at 27 cents per share, four pennies below the year-ago figure.

Big Lots (BIG), a retailer whose colleagues include Target (TGT) and Walmart (WMT), was feeling the wrath of the sellers on Friday. The stock closed down 5% to $29.50. Volume was above the norm.

According to Briefing.com, the company made 23 cents per share in the third quarter. Unfortunately, that was one penny below the overall forecast. In addition, guidance for Q4 wasn't too striking, and same-store sales experienced only slight growth.