Analyst upgrades:

• Goldman upgraded Aeropostale (ARO) to neutral from sell. The firm, which has a $34 target on the stock, cites the recent sell-off in shares for the upgrade.
• Janney Montgomery upgraded Consolidated Water (CWCO) to buy from neutral on valuation and on expectations the company's earnings will recover in 2010. The firm has a $15 target on the stock.
• Wunderlich upgraded Transmontaigne Partners (TLP) to buy from hold on valuation as it believes the sell-off on the company's Q3 results is overdone. The firm keeps a $26.50 price target on the stock.
• Mobile TeleSystems (MBT) was upgraded to buy from neutral at UBS.
• HSBC (HBC) was raised to buy from hold at Societe Generale.
• Redwood Trust (RWT) was upgraded to outperform from market perform at JMP Securities.

Analyst upgrades:

• UBS upgraded Corning (NYSE: GLW) to Buy from Neutral and raised its target to $19 from $18.50, citing the improved LCD supply-demand outlook and improved sell-through ahead of the holiday season in China.
• Credit Suisse upgraded Newfield Exploration (NYSE: NFX) to Outperform from Neutral and raised its target to $48 from $44 citing valuation and improved asset quality.
• Stifel upgraded Newfield Exploration and Ultra Petroleum (NYSE: UPL) shares to Buy from Hold based on strong fundamentals and a long-term positive view for the E&P sector. The firm has a $50 target on Newfield and a $58 target on Ultra Petroleum.
• TJX Companies (NYSE: TJX) was upgraded to Conviction Buy from Buy at Goldman.
• General Mills (NYSE: GIS) was upgraded to Overweight from Equal Weight at Morgan Stanley.
• Coca-Cola Femsa (NYSE: KOF) was upgraded to Buy from Neutral at BofA/Merrill.

Analyst upgrades:

• Citigroup upgraded Talbots (NYSE: TLB) to Buy from Hold on expectations the company's sales and margins are at an inflection point. The firm expects comps to turn positive in the next six months and raised its target on shares to $9.50 from $5.
• JMP Securities believes that Apple's (NASDAQ: AAPL) incoming iPod product cycle, geographic expansion of iPhones, and market expansion led by new products will result in "significant" outperformance. The firm upgraded shares to Outperform from Market Perform and has a $200 target on the stock.
• Credit Suisse upgraded Tiffany (NYSE: TIF) to Outperform from Neutral citing productivity comps and gross margin upside, leading to potential upside to 2010 Street estimates. The firm raised its target to $45 from $20.
• Brady (NYSE: BRC) was upgraded to Buy from Hold at KeyBanc.
• Time Warner (NYSE: TWX) was upgraded to Conviction Buy from Neutral at Goldman.
• RadioShack (NYSE: RSH) was upgraded to Overweight from Equal Weight at Morgan Stanley.

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

• American Eagle Outfitters Inc. (NYSE: AEO) Q2 profit fell short of estimates as same-store sales declined.
• Ann Taylor Stores Corp. (NYSE: ANN) Q2 earnings beat very low expectations and same-store sales fell.
• Big Lots Inc. (NYSE: BIG) reported better-than-expected numbers for Q2, sending shares upward.
• Burger King Holdings Inc. (NYSE: BKC) posted a better-than-expected Q4 profit though revenue declined.
• China Petroleum & Chemical Corp. posted a record Q2 profit after restrictions on fuel prices were lifted.
• Dell Inc. (NASDAQ: DELL) said its Q2 earnings declined, but they still topped analysts' expectations.

Canadian banks are scheduled to step into the earnings spotlight this week, with third-quarter reports coming from Bank of Montreal (NYSE: BMO), Bank of Nova Scotia (NYSE: BNS), Canadian Imperial Bank of Commerce (NYSE: CM), Royal Bank of Canada (NYSE: RY), and Toronto-Dominion Bank (NYSE: TD). While Canadian banks on the whole held up better than their U.S. counterparts during the financial crisis, these five are expected to report that their earnings are still declining in the most recent quarter.

Analysts surveyed by Thomson Reuters are looking for EPS for these banks to have fallen from 15% to 25% from a year ago. Their long-term EPS growth forecast is for between 10% and 12%, which is in the same range as U.S. rivals JPMorgan Chase & Co. (NYSE: JPM) and Wells Fargo & Co. (NYSE: WFC), but better than Bank of America Corp. (NYSE: BAC) and Citigroup Inc. (NYSE: C). Earnings multiples for these Canadian banks are 10x to 12x, but none of them have a First Call consensus recommendation is to buy. The Motley Fool, though, considers TD as a value stock and RY a stock poised to pop. All of them are trading much closer to their 52-week highs than lows, and shares of all are up more than 100% since March lows.

Analyst upgrades:

• Merriman upgraded Sunpower (NASDAQ: SPWRA) two levels to Buy from Sell after transitioning coverage. The firm believes Sunpower is emerging from the current recession as the CleanTech leader and has a $38-$48 price range on shares.
• Citigroup upgraded Varian Medical (NYSE: VAR) to Buy from hold as it believes capex pressure and health care reform uncertainty is priced into shares, and demand will return as hospital budgets stabilize. Citi raised its target on shares to $45 from $36.
• FBR Capital upgraded Gap (NYSE: GPS) to Outperform from Market Perform following the Q2 results to reflect product improvement and ongoing inventory control. The firm raised its target on shares to $24 from $18.
• Schnitzer Steel (NASDAQ: SCHN) was upgraded to Neutral from Sell at UBS.
• UDR Inc. (NYSE: UDR) was upgraded to Market Perform from Underperform at Wells Fargo.
• The Buckle (NYSE: BKE) was upgraded to Buy from Hold at Roth Capital.

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

• American Eagle Outfitters Inc. (NYSE: AEO) reported better-than-expected Q1 earnings, lifting shares.
• AutoZone Inc. (NYSE: AZO) posted a better-than-expected Q3 profit said it will continue to buy back shares.
• Bank of Montreal (NYSE: BMO) reported lower Q2 earnings and also announced 1,100 layoffs.
• Big Lots Inc. (NYSE: BIG) higher Q1 earnings topped estimates even though same-store sales fell.
• BioMed Realty Trust Inc. (NYSE: BMR) earnings prospects after the recent capital raise led to a downgrade.

Tiffany & Co. (NYSE: TIF) reported its first quarter results this morning, matching analyst estimates with 20 cents per share on lower sales. This marks a 60% drop year over year compared with the 50 cents per share that it earned during its first quarter of 2008.

As I noted in our earnings preview yesterday, the luxury jewelry retailer is facing some tough times. Consumers have been cutting back on spending, and this is being felt by all retailers. Tiffany has been no exception.

After the Memorial Day holiday in the United States, the earnings spotlight turns to Canadian banks: Bank of Montreal (NYSE: BMO), Canadian Imperial Bank of Commerce (NYSE: CM), Royal Bank of Canada (NYSE: RY), and Toronto-Dominion Bank (NYSE: TD) are all scheduled to report their second-quarter results.

While banks north of the border of generally have held up better than their U.S. counterparts, analysts surveyed by Thomson Reuters expect the four listed above to report that earnings declined between 20% and 30% since the same period of last year. All four have P/E ratios around 10, and they are paying dividends. Shares of all four have surged 50% to 83% in the past three months, but are still 26% to 38% lower than a year ago.

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

• Accenture Ltd. (NYSE: ACN) said revenues and bookings both declined in the most recent quarter.
• Best Buy Co. Inc. (NYSE: BBY) reported strong Q4 results in the wake of Circuit City's demise.
• Carnival Corp. (NYSE: CCL) sailed past analysts' Q1 projections, sending shares higher.
• ConAgra Foods Inc. (NYSE: CAG) Q3 results topped analysts expectations and drove shares higher.
• DryShips Inc. (NASDAQ: DRYS) swung to a larger-than-expected Q4 loss and revenue slipped.
• DSW Inc. (NYSE: DSW) reported a bigger-than-expected Q4 loss as same-store sales declined.

The shares of Tiffany & Co. (NYSE: TIF) are taking a beating today, down nearly 3% at last check. Traders are reacting to news that Trian Fund Management L.P., under the helm of billionaire investor Nelson Peltz, reduced its stake in TIF from 8.5% to 6.9%.

According to a filing with the Securities and Exchange Commission, Trian sold 2.25 million shares on Wednesday and Thursday at prices ranging from $22.58 to $22.61 per share. Now, the fund beneficially owns 8.49 million shares of TIF.

Late last year my colleague Joseph Lazzaro posted a story about NYU's 'Dr. Doom' Roubini: Stocks may fall another 20% during recession. That has to make one take pause when considering an investment in the stock market today, even after a major drop retesting November lows this week. On the other hand, Warren Buffett went out of his way to encourage the investing public and money managers alike that it was safe to go back into the market.

However, today it has been widely reported that Buffett sold off half of his holdings in Johnson & Johnson and trimmed his stake in Procter & Gamble.