Retailers like Walmart (WMT) and Target (TGT) are campaigning to force Amazon.com (AMZN) to pay sales taxes. While these retailers headline the effort and would certainly gain from any such decision, other large players like Costco (COST) have (relatively) flown under the radar. Could Costco see the same benefit? Costco traditionally competes with warehouse club operators like BJ's Wholesale Club (BJ) and Sam's Club, in addition to companies like Walmart, Best Buy (BBY) and Target.

Our price estimate for Costco's stock stands at $64.67, a roughly 10% discount to the stock's current market price.

Consumer Confidence saw a huge drop for March, but that failed to hurt the markets as it was largely expected. Housing prices continued south according to national housing survey data from Case Shiller. International stock markets saw a mixed bag on Tuesday, but U.S. investors continued to sit there, buying stocks. Maybe the real catalyst is the fact that very few companies have formally lowered guidance despite the turmoil.

Here are today's unofficial closing bell levels:

Dow Jones: 12,279.01 + 81.13 (0.67%)

Facebook primarily competes with Google (GOOG), Yahoo! (YHOO), Microsoft (MSFT) and Aol (AOL) in the display and search advertising markets. Here we highlight three major revenue streams that contribute to Facebook's value.

We currently peg Facebook's intrinsic value at $45.1 billion.

A new business model is springing up right under our noses. The big players like Apple (AAPL), Amazon.com (AMZN) and Google (GOOG) have put together a one-stop shop in their app stores.

First off, an app store is just that, a place where you can pick and choose the apps you want to download. The app store is also a place where entrepreneurs can develop an app and with permission place it on the iPhone, iPad or Android device.

Akamai's (AKAM) most important division is its media content delivery, constituting around 34% of its stock value by our estimates. The high value attributed to this division in our analysis comes from expectations of rapid growth in Akamai's revenue per media customer. As a content delivery company providing web content to its customers, Akamai competes with other players like InterNAP Network Services (INAP), Limelight Networks (LLNW) and Level 3 (LVLT).

Our price estimate for Akamai stands at $37.11, which is roughly in line with market price.

Despite a weak durable goods figure this morning, despite more woes in Ireland and Portugal, and despite energy rising, the markets managed yet another gain. It is now almost back to 'international markets don't matter' in investor minds despite all of the risks and turmoil.

Here were today's closing bells:

Dow Jones 12,170.56 +84.54 (0.70%)
S&P 500 1,309.66 +12.12 (0.93%)
Nasdaq 2,736.42 +38.12 (1.41%)

Shares of retail giant Best Buy (BBY) traded higher Thursday morning after the company posted better-than-expected earnings for its fourth quarter.

Going into the earnings report, analysts had been expecting to see Best Buy report earnings of $1.84 per share for the quarter. Best Buy topped estimates by posting earnings of $1.98 per share.

Bookseller Barnes & Noble, Inc. (BKS) has been hoping to find a potential buyer, but it appears as though its search will end with no buyer.

The book seller has been searching for months for a potential buyer, and the search will likely continue for a couple more weeks, but people close to the bidding process have stated that it looks unlikely that the company will be able to find a buyer.

Best Buy (BBY) captures one third of U.S. consumer electronics sales, according to the Wall Street Journal (subscription required). That's the good news.

But now Best Buy is losing market share. You are probably wondering why this has happened. After all since Circuit City evaporated into bankruptcy, you would think that Best Buy would be king of the hill. Not so. Other trends are developing that are eroding Best Buy's territory. Here are a few them:

The publishing industry is experiencing an new and booming business in e-books. According to Forrester Research, consumers spent $1 billion on e-books in 2010. That number is expected to triple by 2015. In the US there were about 10 million e-readers in circulation in 2010, triple that of 2009.

The two leading players in the e-reader market are Amazon (AMZN) with its Kindle and Barnes and Noble's (BKS) Nook. With these readers a single reader can use the reader or a friend can be added as long as they know each other's email, according to the Wall Street Journal.

Analyst Upgrades

• Medicis (MRX) to overweight from neutral at Piper Jaffray, to outperform from market perform at Bernstein, to outperform from sector perform at RBC Capital and to overweight from neutral at JPMorgan.
• Wellpoint (WLP) to buy from neutral at Davenport.
• Humana (HUM) to buy from hold at Jefferies.
• Frontier Oil (FTO) to equal weight from underweight and Resources Connection (RECN) to overweight from equal weight at Barclays.

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.

There's a new industry in the making. It's in the way we buy and read books. Electronic books, or e-books, are taking the book market by storm. Here's a mind blowing statistic. Barnes & Noble (BKS) announced that in December its e-book sales exceeded print books, as reported in MSNMoney.

The two big leaders in the e-book market are Amazon.com (AMZN) and Barnes & Noble with the Kindle and Nook readers respectively. Both companies said that e-readers are their best-selling product of all time.

According to the Wall Street Journal (subscription required), Amazon.com (AMZN) is launching a bulk email sending service aimed at businesses and developers. The goal is to expand its Web server services.

Amazon already has huge servers. The new email service is a way to gain added revenue. The service is called Amazon Simple Email Service (SES). The program offers a free usage tier, after which customers pay 10 cents per thousand email messages sent.

CBOE Volatility Index (VIX) rises 24% to 20.03 on antigovernment protests in Egypt.

United States Oil Fund (USO) closed up 4.3% as WTI Crude futures have traded up 4.37% to $89.38, according to Bloomberg. Traders were focused on short-term February 38 calls. February put option implied volatility of 29 is below its 26-week average of 31 according to Track Data, suggesting decreasing price movement.

Option volume leaders are Apple (AAPL), Citigroup (C), Amazon.com (AMZN) and Netflix (NFLX), according to Track Data.

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