Buffalo Wild Wings (BWLD) is significantly higher after the restaurant chain topped analysts' second-quarter earnings expectations.

After Tuesday's closing bell, Buffalo Wild Wings reported a quarterly profit of $9.2 million, or 50 cents per share, up from its year-ago earnings of $7.0 million, or 39 cents per share. Revenue for the period climbed 12.4% to $145.7 million. Analysts surveyed by Thomson Reuters were anticipating earnings of just 42 cents per share on $141.5 million in revenue.

Analyst Upgrades

• BofA/Merrill upgraded Eastman Chemical (EMN) to buy from neutral and raised its target to $82 from $80. The analyst upgraded shares based on valuation and expectations for strong earnings from fibers and performance chemicals.
• Bernstein upgraded Hershey (HSY) to market perform from underperform based on strong near-term category growth.
• Janney Montgomery upgraded Actuant (ATU) to buy from neutral with a $25 price target following the company's Q3 results.
• Infinera (INFN) was upgraded to buy from hold at Stifel Nicolaus.
• CTC Media (CTCM) was upgraded to buy from neutral at UBS.
• Williams (WMB) was upgraded to conviction buy from buy at Goldman.

Analyst Upgrades

• Wells Fargo upgraded Norfolk Southern (NSC) to outperform from market perform following the company's Q1 results.
• RBC Capital transferred coverage on Gildan Activewear (GIL) with an outperform from sector perform. The firm is positive on Gildan's low-cost producer strategy and free cash flow generation. The firm raised its target to $35 from $26.
• Wunderlich upgraded Delphi Financial (DFG) to buy from hold following the company's Q1 results and raised its target for shares to $31 from $29.
• Aflac (AFL) was upgraded to buy from neutral at Sterne Agee.
• Time Warner (TWX) was upgraded to outperform from neutral at Cowen.
• Pride International (PDE) was upgraded to outperform from neutral at Credit Suisse.

Analyst upgrades

• Deutsche Bank upgraded Sonoco Products (SON) to buy from hold after the company reported Q1 results and raised guidance. The firm upped its target for shares to $38 from $32.
• Baird upgraded Western Digital (WDC) to outperform from neutral following the solid Q3 report and guidance. The firm raised its target to $50 from $48.
• Goldman upgraded Qwest (Q) to neutral from sell. Qwest is being acquired by CenturyLink (CTL).
• Hershey (HSY) was upgraded to neutral from underweight at JPMorgan.
• Principal Financial (PFG) was upgraded to neutral from sell at UBS.
• Monster Worldwide (MWW) was upgraded to market perform from underperform at Wells Fargo.

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

• Activision Blizzard Inc. (ATVI) reported better-than-expected Q4 earnings and declared an annual dividend.
• Allstate Corp. (ALL) swung to better-than-expected Q4 earnings and also swung to a full-year profit.
• Buffalo Wild Wings Inc. (BWLD) shares tumbled after it posted disappointing earnings tied to costs.
• The Cheesecake Factory Inc. (CAKE) posted better-than-expected Q4 earnings but sales were flat.
• Chipotle Mexican Grill Inc. (CMG) earnings numbers for Q4 resulted in upgrades from two analysts.
• CVS Caremark Corp. (CVS) higher Q4 earnings matched the expectations of analysts, and shares rose.

Humble restaurant chain Buffalo Wild Wings (BWLD) is scheduled to release its fourth-quarter earnings report after the market closes on Thursday, Feb. 11. Ahead of the event, analysts surveyed by Thomson Reuters are looking for a profit of 51 cents per share, up from 43 cents per share in the year-ago quarter. BWLD has an impressive history in the earnings spotlight, having matched or exceeded Wall Street's consensus expectations in each of the previous four reporting periods.

Casual restaurant chain Buffalo Wild Wings (BWLD) scored an upgrade on Monday, with Morgan Keegan raising its rating from market perform to outperform. As a result, the shares kicked off the week by rallying more than 4%, and reclaiming a perch above the 10-day and 20-day moving averages.

However, option traders were hardly impressed by Morgan Keegan's bullish note, or by the stock's resulting gains. During the course of Monday's session, speculators on the International Securities Exchange (ISE) bought to open 1,000 puts on BWLD, compared to just 181 calls. The equity's single-day put/call volume ratio of 5.52 reveals that bearish bets were snapped up at a much faster pace than their bullish counterparts.

Analyst upgrades:

• Sierra Wireless (NASDAQ: SWIR) was upgraded at Jefferies to Hold from Underperform following Q3 results. The firm believes the Wavecom acquisition integration is progressing better than expected and finds the valuation attractive at current levels. The firm raised its price target to $10 from $5.
• Boston Properties (NYSE: BXP) was upgraded to Buy from Hold at Deutsche Bank to reflect the company's recapitalization and better-than-expected occupancy. The firm raised its target to $69 from $46.
• Wyndham (NYSE: WYN) was upgraded to Outperform from Market Perform at FBR Capital after the shares sold off following the company's Q3 results. The firm raised its target to $23 from $15.
• Human Genome (NASDAQ: HGSI) was upgraded to Overweight from Neutral at JPMorgan. Target was raised to $25 from $14.
• Urban Outfitters (NASDAQ: URBN) was upgraded to Overweight from Market Weight at Thomas Weisel as they expect a "meaningful sales and earnings improvement in Q4." Target was raised to $39 from $32.
• Methanex (NASDAQ: MEOH) was upgraded to Buy from Neutral at UBS, citing improved methanol demand following the Q3 report. Target was raised to $19.50 from $17.
• Buffalo Wild Wings (NASDAQ: BWLD) was upgraded at Raymond to Market Perform from Underperform.

Analysts, on average, are expecting BWLD to report a profit of 46 cents per share, up from 36 cents per share in the first quarter of 2008. The company has a mixed history in the earnings confessional: in its previous four reports, the chain has exceeded analysts' estimates twice, met them once, and fallen short on one other occasion.

As the quarterly reports continue to roll out and the market continues to rally, optimism seem to be rising. Analysts certainly have high hopes for some companies reporting earnings this week.

Analysts surveyed by Thomson Reuters expect First Solar Inc. (NASDAQ: FSLR) to report first-quarter earnings of $1.51 per share, which is 62.3% higher than a year ago. Revenue for the quarter is expected to be 105.6% higher, or $404.9 million. First Solar earnings have topped expectations in the past five quarters, by as much as 47.3%. The long-term EPS growth forecast is 40.6% and the forward PE ratio estimate is 23.0. In the previous quarter, Tempe, Ariz.-based First Solar reported having more cash on hand than debt. The First Call consensus recommendation is to buy FSLR; CNBC recently included it as a stock pick. First Solar has announced that it will build new solar power plants in Nevada and Germany. Its share price has risen 6.9% since the beginning of the year to $147.46.

Two leading advisors -- both known for an expertise in technical analysts -- are bullish on the prospects for Buffalo Wild Wings (NASDAQ: BWLD), which operates and franchises casual food restaurants in 38 states.

Here's an overview of the stock from Joseph Hargett, an analyst with Schaeffer Investment Research, and Richard Schmidt, editor of The Stellar Stock Alert.

Schmidt explains, "You've got to love the action of Buffalo Wild Wings. Last month, the stock jumped up nearly 25% in one day and continued to move up.

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

• Applied Materials Inc. (NASDAQ: AMAT) posted a Q1 loss and announced a workforce reduction.
• ArcelorMittal (NYSE: MT) swung to it's first ever quarterly loss due to lower demand and a big write-down.
• Buffalo Wild Wings Inc. (NASDAQ: BWLD) shares surged after it posted strong Q4 results.
• Chipotle Mexican Grill Inc. (NYSE: CMG) posted better-than-expected Q4 earnings as revenue surged.
• Genzyme Corp. (NASDAQ: GENZ) topped Q4 earnings estimates, sending shares higher.
• Global Traffic Network Inc. (NASDAQ: GNET) weaker-than-expected Q2 results led to a downgrade.
• Level 3 Communications Inc. (NASDAQ: LVLT) shares fell despite its upside surprise for Q4.
• Lions Gate Entertainment (NYSE: LGF) posted a bigger-than-expected Q3 loss despite revenue growth.

When Buffalo Wild Wings (NASDAQ: BWLD) reported a sharp drop in earnings for the third quarter last November, the stock plummeted to a 52-week low of $14.50 during the succeeding two months.

At the time, I suggested that the fundamentals at the company were so strong that the analysts downplaying the stock and the investors driving the price down were mistaken.

BWLD recovered in early December and held on to those gains for the first part of 2009. With the release of the fourth-quarter earnings report yesterday, the stock has added another 30%-plus to its price.