"Walgreen (WAG) a holding on our recommended buy list, reported a 10% increase in its fiscal second-quarter profit," notes Geoffrey Seiler.

The editor of BullMarket.com explains, "Although investors hammered the stock, we think the company delivered solid sales growth. We continue to believe the best is yet to come for Walgreen, with several notable catalysts in the wings.

With a name like Drugstore.com (DSCM), there is little doubt what the company does. Unfortunately, the stock price has been miserable since the dot-com bust. All in all, it has remained in the low single digits. Then again, the company has had to deal with tough rivals, like Amazon.com (AMZN).

But Thursday, investors got a nice surprise. Walgreen (WAG) has agreed to buy Drugstore.com for $429 million. In early trading, DSCM was up a whopping 112% to $3.79.

Walgreen (WAG), Dollar General (DG) and Express (EXPR) all reported higher quarterly profits Tuesday morning, with Dollar General and Express both beating Wall Street consensus earnings estimates. With news like this, it may be beneficial for an investor to take a closer look at the retail sector.

Granted, Walgreen did not impress Wall Street, and shares fell more than 7%. Express and Dollar General, however, are reaping the benefits with Express trading up over 5% and Dollar General enjoying a 3% upswing. Both companies opened trading up in the markets Tuesday.

Quarterly reports from Oracle (ORCL), Discover (DFS) and Tiffany (TIF) will highlight news on the earnings front this week.

Elsewhere on the economic calendar, the focus will be on housing, with existing home sales data due from the National Association of Realtors on Monday, new home sales numbers from the Census Bureau on Wednesday and data on housing starts released on Thursday.

Also watch for durable goods orders in February and the final GDP for the fourth quarter.

CVS Caremark (CVS), a drugstore chain that competes with Rite Aid (RAD) and Walgreen (WAG), reported earnings for the fourth quarter on Thursday. The market wasn't taken by them. Looking at the extreme right side of the chart, it can be seen that the stock came under some pressure after the release. This afternoon, the shares are under further pressure: at the time of this writing, they were off by 1.1% to $32.55, with heavy volume backing the trade.

Does it sound like the company missed the estimate attached to it? No, that wasn't the problem. According to the Associated Press, adjusted profit came in at 80 cents per share, one penny ahead of the prediction.

Analyst Upgrades

• Electronic Arts (ERTS) to overweight from neutral at Piper Jaffray.
• Helix Energy (HLX) to overweight from equal weight at Morgan Stanley.
• Quest Software (QSFT) to neutral from sell at Goldman.
• LTX-Credence (LTXC) to buy from hold at Needham.
• Anadarko (APC) to buy from hold at Canaccord.
• Walgreen (WAG) to hold from sell at Citigroup.
• Pericom (PSEM) to buy from hold at ThinkEquity.

Analyst Upgrades

• Polo Ralph Lauren (RL) to buy from hold at Citigroup.
• Qualcomm (QCOM) to buy from neutral at Roth Capital.
• Walgreen (WAG) to conviction buy from neutral at Goldman.
• Rockwell (ROK) to outperform from neutral at Credit Suisse.
• Carnival (CCL) to buy from hold at Deutsche Bank.
• SunTrust (STI) and TD Bank (TD) to outperform from market perform at Keefe Bruyette.
• Hawaiian Electric (HE) to outperform from neutral at RW Baird.
• Essex Property Trust (ESS) to outperform from neutral at Macquarie.
• Amgen (AMGN) to neutral from underperform at BofA/Merrill.

Walgreen (WAG) is having a merry Christmas. The stock closed on Thursday at $39.19. The 52-week high for the shares is $40.20. Pretty cool for those who own this name. Something even cooler: the drugstore chain issued a solid fiscal first-quarter report earlier in the week.

The press release begins with three bragging bullet points: the top line gained 6% and came in at $17.3 billion; gross margin expanded by 80 basis points; operating cash flow was $1.2 billion. Nice, but in terms of the latter point, it should be noted that cash from operations was essentially flat compared to last year's number. That's okay, though, it's still respectable.

Companies continue to file quarterly reports late in the season, and a few are poised to spread some early holiday cheer for investors this week. Analysts surveyed by Thomson Reuters expect strong earnings results from Nike (NKE), Bed Bath & Beyond (BBBY) and Darden Restaurants (DRI), among others. Here's a quick look (for more details, see the DailyFinance Week in Preview).

Analysts forecast Nike's fiscal-second quarter earnings to come in at 88 cents per share, a 13.6% increase from the same period of last year. The world's leading athletic footwear maker also is expected to post revenue of $4.8 billion for the three months that ended in November. That's 9.3% more than the same period a year earlier. Note that Nike's earnings have not fallen short of consensus estimates in the past five quarters.

Analyst Upgrades

• Amgen (AMGN) to overweight from neutral at Piper Jaffray.
• Goodrich Petroleum (GDP) to outperform from market perform at Wells Fargo.
• Tutor Perini (TPC) to buy from neutral at UBS.
• Covidien (COV) to buy from neutral at Goldman.
• Sara Lee (SLE) and Comcast (CMCSA) to outperform from market perform at Bernstein.
• Research In Motion (RIMM) to outperform from sector perform at FBN Securities.

Analyst Upgrades

• Walgreen (WAG) and Triumph Group (TGI) to buy from neutral at UBS.
• Focus Media (FMCN) to buy from neutral at Goldman.
• Home Depot (HD) to outperform from market perform at FBR Capital.
• Arbitron (ARB) to overweight from neutral at JPMorgan.
• Waddell & Reed (WDR) and Legg Mason (LM) to overweight from equal weight, and Janus Capital (JNS) to overweight from underweight, at Barclays.
• Central Euro Media (CETV) to buy from hold at Deutsche Bank.
• GenOn Energy (GEN) and Ntelos (NTLS) to outperform from sector perform at RBC Capital.
• Cooper Tire (CTB) to buy from neutral and Goodyear Tire (GT) to buy from underperform at BofA/Merrill.