What a difference a few months can make. Back in December, I was a bit bearish on Big Lots (BIG). That was at $29.50. Know what the stock closed at yesterday? Its final price was $41.33. And that's rather close to the 52-week high of $42.27.

To fully appreciate how dramatic the rise in the stock has been requires a look at the one-year chart. Impressive, isn't it? I guess I should have been a stronger believer in the retailer. So, what should I be thinking now?

U.S. stocks opened the trading session with the Dow Jones Industrial Average surging 125 points at the open. The Nasdaq Composite and S&P 500 also soared over 1%. The market responded partly to weekly jobless claims figures, which plunged to a nearly three-year low.

Overseas, positive sentiment ruled the European markets today. While STOXX Europe 600 Index has advanced 0.94%, London's FTSE 100 Index moved up 1.29%.

Analyst Upgrades

• U.S. Steel (X) to buy from neutral and Barnes & Noble (BKS) to neutral from sell at Goldman.
• Salesforce.com (CRM) to buy from hold at Jefferies.
• Dollar Tree (DLTR) to overweight from equal weight at Barclays.
• Edison International (EIX) to hold from sell at Citigroup.
• Analog Devices (ADI) to overweight from neutral at JPMorgan.

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.

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.

Analyst Upgrades

• Piper Jaffray upgraded Duoyuan Global Water (DGW) to neutral from underweight, citing the potential for positive fundamental news flow through the end of the year, and upped its price target to $16 from $9.
• Jefferies upgraded Alcatel-Lucent (ALU) to buy from underperform, expecting a benefit from a significant ramp in EVDO software sales as mobile data growth accelerates.
• Myriad Genetics (MYGN) was upgraded at RBC Capital to outperform from sector perform with a $23 price target based on valuation and potential to be acquired.
• Goldman upgraded Mohawk (MHK) to neutral from sell with a $53 price target.
• Smithfield Foods (SFD) was upgraded to outperform from market perform at BMO capital with a $21 target.
• Priceline.com (PCLN) was upgraded to outperform from market perform at Morgan Keegan.

Analyst Upgrades

• Citigroup upgraded FMC Technologies (FTI) to buy from hold, citing pent-up deepwater drilling demand and valuation. Despite upgrading, the firm lowered its target for shares to $69 from $77.
• Piper Jaffray upgraded Valeant (VRX) to overweight from neutral following the company's merger with Biovail (BVF) and raised its target for shares to $53 from $43.
• Deutsche Bank upgraded Lincare Holdings (LNCR) to buy from hold, citing valuation and the company's dividend initiation. The firm upped its target for shares to $37 from $35.
• Ariba (ARBA) was upgraded to overweight from neutral at JPMorgan.
• Crucell (CRXL) was upgraded to buy from hold at RBS.
• ENI SpA (E) was upgraded to buy from neutral at Goldman.

Both Walmart (WMT) and BJ's Wholesale Club (BJ) reported strong quarterly results last week, suggesting that discount retailers are still doing well even as the economy seems to be coming around. This week, Costco (COST) and Big Lots (BIG) take their turns in the earnings spotlight, and analysts surveyed by Thomson Reuters expect a strong showing from them as well.

And we'll round out this preview of the coming week with a look at expectations for AutoZone (AZO), Canada's big banks, and Trina Solar (TSL).

Here are some highlights from this past week's earnings coverage on BloggingStocks:

• AutoZone Inc. (AZO) reported better-than-expected Q2 earnings, as well as sales and gross margin growth.
• Big Lots Inc. (BIG) beat Q4 earnings expectations, raised its guidance, and lifted its share repurchase program.
• Carmike Cinemas Inc. (CKEC) swung to better-than-expected profit in Q4 and reported strong sales growth.
• Ciena Corp. (CIEN) reported a bigger-than-expected Q1 net loss and some revenue growth, and offered guidance.
• DISH Network Corp. (DISH) posted a year-over-year increase in Q4 revenue but also a decline in per-share earnings.

Big Lots (BIG) surely satisfied its investors yesterday when it reported double-digit earnings growth. On an adjusted basis, net income from continuing operations jumped over 30% to $1.31 per share during the fourth quarter. Analysts couldn't keep up, because they were looking for $1.28 per share, according to Earnings.com.

Total sales went up 7%, but same-store revenue, the more vital metric, was higher by 5.1%. Cash flow from operating activities for both the quarter and the full fiscal year experienced significant increases. Gross margin expanded over both of those periods as well.