Potash Corp. of Saskatchewan (NYSE: POT) is under fire today after the firm lowered its second-quarter earnings outlook. Late Thursday, POT said it now expects earnings per share of 70 cents, compared to its prior outlook of $1.10 to $1.50 per share.

The company chalked up its slashed guidance to "substantially lower than forecasted potash sales volumes due to deferral of purchases by customers around the world and lower realized prices for phosphate fertilizers."

POT's full second-quarter results will be reported on July 23. Analysts surveyed by Thomson Reuters are looking for a profit of 81 cents per share, on average.

In the most recent edition of Barron's, fund manager Scott Black touted shares of Cal-Maine Foods (NASDAQ: CALM), the country's largest egg producer, as a stock worth buying. The company generates a return on equity of over 30%, and Black said that at just over 5x earnings, the stock is extraordinarily cheap. When the market revalues Cal-Maine at "just eight times [next year's estimated] earnings, you've got a $38.50 stock." Shares of CALM, which closed Friday at $22.90, were up to $24.86 by Wednesday morning.

I'm familiar with Cal-Maine, having been introduced to the company more than a year ago when it was the focus of a presentation at the Boston College Investment Club. Last summer, I spoke with the company's CFO, Tim Dawson, who gave me a much better understanding of the egg business. Though I came away convinced that Cal-Maine is in very capable hands, I believed then -- as I still do now -- that the stock is not a buy. Here's why.

"Income investors have to be very careful when searching for yield; many high-yielding stocks have turned in disastrous performances over the last year," cautions Chuck Carlson.

In his The DRIP Investor he adds, "That's what makes Philip Morris International (NYSE: PM) so attractive. The issues stands as as one in which investors can be confident of a steady dividend stream."

"The stock's current yield of 5% is especially attractive in this environment. And the dividend is taxed at the current preferential tax rate of just 15%, giving it an extra appeal relative to yields on fixed-income investments. Furthermore, the dividend is safe.

"Asia is booming again, and one industry that is growing like wildfire is 'green' tech in China," says Mark Skousen. In The Turnaround Alert, he eyes China Green Agriculture (AMEX: CGA)."

"Urban population and demand for energy is exploding, causing pollution and a reduction in per capita arable land to feed 1.4 billion Chinese.

"One way to profit is to buy China Green Agriculture, one of the fastest-growing agricultural technology companies in China.

Despite a 46% gain since adding iShares MSCI Brazil (NYSE: EWZ) to his portfolio, global expert Keith Fitz-Gerald still sees upside potential. Here's the latest from Money Map Reporter.

"History tells us that the best gains come to those who have the courage to buy undervalued companies in the face of extreme pessimism – and that sounds a lot like right now. So while we may not be at the very bottom, we are nonetheless pretty darn close.

In The Cabot Benjamin Graham Value Letter, editor J. Royden Ward searches for stocks that meet the investing criteria of the legendary Ben Graham, known as the father of value investing and mentor of Warren Buffett.

Here, the advisor takes a look at Overseas Shipholding Group (NYSE: OSG), a crude oil and energy shipping operation.

"Overseas Shipholding is a leading crude oil and energy shipping company with 120 vessels either owned or leased. In addition, the company derives 25% of revenues from grain, coal, and iron ore.

Shares of seed and agricultural products company Monsanto Company (NYS: MON) plunged from $92 to $79 yesterday when the company lowered guidance. Monsanto has long been a favorite play on the growing demand for food. It's high-tech, genetically manipulated seeds can produce higher crop yields. No doubt, the food future looks bleak and that's good for Monsanto. But how long will investors have to wait before demand hockey sticks for these seeds and Monsanto can make higher prices stick?

Is there a big commodities rally underway? Let's look at the numbers:

• The Commodity Research Bureau index (CRB) of 19 energy, metal and agricultural prices gained 14%, the most since 1974
• Gasoline soared 30% in May
• Gold and copper also surged
• Corn and soybeans reached their highest levels since last September
• Crude oil has jumped 29%, the most since 1999
• Gasoline futures for June delivery surged 31%, the most since 2006
• Cotton futures were up
• Gold is at $980.00 per ounce
• Silver posted the biggest monthly gain in 22 years

So you are probably asking: What is fueling this rally?

Is it time to ride the rails? In Gordon Pape's The Internet Wealth Builder, analyst Tom Slee reaffirms his buy rating on Burlington Northern Santa Fe (NYSE: BNI), his top pick in the sector.

"Burlington Northern is my preferred choice in the railroad industry. At first glance, Burlington Northern had a particularly bad first quarter.

"Profit was $0.86 a share, down sharply from $1.30 a share the year before. However, when unusual items such as an unfavourable coal rate decision are excluded, operating earnings amounted to a much more acceptable $1.13 a share, well above the 96c analysts were looking for.

Agricultural issue Archer Daniels Midland Company (NYSE: ADM) is sharply lower in today's trading after falling short of Wall Street's earnings expectations. The company confessed to a 98% slide in third-quarter net income, thanks to hefty investment losses and a weak pricing environment.

ADM reported a profit of $8 million, or 1 penny per share, compared to its year-ago results of $517 million, or 80 cents per share. Investment losses for the period totaled 36 cents per share. Revenue for the quarter tumbled 21% to $14.8 billion, impacted by strength in the U.S. dollar and softer commodity prices. As a result, gross margin contracted from 6.2% to 4.4%.

"Resource-rich, politically stable and increasingly prosperous, Chile is an attractive play on commodities and growing wealth in emerging markets," explains Mark Salzinger, editor of The Investor's ETF Report.

Chile is also a favorite investment position of Nicholas Vardy, editor of The Global Bull Market Alert, who notes, "Thanks to its fiscal prudence, its lack of a domestic housing bubble, and its sizeable wealth reserves, Chile has weathered the current global economic meltdown better than most countries."

Here, the two advisors assess the longer-term opportunity in iShares MSCI Chile (NYSE: ECH), an exchange-traded fund.

Illinois-based Corn Products International, Inc. (NYSE: CPO) stepped into the earnings spotlight this morning, with the food firm reporting first-quarter net income of $17 million, or 22 cents per share, down sharply from $64 million, or 85 cents per share, in the first quarter of 2008. Sales for the period fell 11% to $831.1 million.

The results were impacted by higher net corn costs, softer volumes, and foreign currency translations. Analysts were expecting significantly higher earnings of 49 cents per share, according to Thomson Reuters.

As if the wide earnings miss wasn't enough of a downside catalyst, CPO multiplied its negative momentum by slashing its outlook for the remainder of 2009. "We now anticipate lower volumes in North America due to the economic environment and a slightly longer than anticipated rebound in pricing in Brazil to offset the currency and volume impact," explained Chief Executive Sam Scott.

U.S. stock futures were sharply lower Tuesday morning as investors were concerned about further implications of the swine flu as the WHO increased its threat level for the outbreak, and as it has been reported Citigroup and Bank of America may need to raise more cash.

As the number of confirmed and suspected cases of swine flu worldwide rose, the World Health Organization increased its alert level on the deadly disease to phase 4, and added that containment of the outbreak wasn't feasible.

I remember Toronto during SARS. As one of the harder hit areas, it was not a happy place. It was the end of winter, but that miserable, cold winter just didn't want to end. People walked the streets in a gloomy haze, afraid to take the subway and giving dirty looks to anyone brazen enough to cough in public. Worse, I couldn't even visit a friend in the hospital. All things considered though, in global pandemic terms, it was over relatively quickly. Let's hope swine flu will be the same.

In the meantime, let's put on our investors hats and see what's in store for some stocks:

Travel and tourist stocks
This is one of the worst hit areas, especially airlines, as people may cancel their travel plans. For example, AMR Corp. (NYSE: AMR) traded over 9 percent lower an hour after the open. Royal Caribbean Cruises (NYSE: RCL) was down over 15 percent. In fact UBS downgraded these airlines and hotels this morning: AMR, Continental Airlines (NYSE: CAL), Host Hotels and Resorts (NYSE: HST), Lasalle Hotel Properties (NYSE: LHO), Marriott (NYSE: MAR), United Airlines (NASDAQ: UAUA), US Airways (NYSE: LCC). Carnival Cruise Lines (NYSE: CCL) also declined considerably. Best to stay away from the sector.

This post is part of a seven article report -- Food for thought: Best bets in food & beverage stocks.

"The fast-casual restaurant category is sizzling as consumers trim their eating budgets; this trend is helping Panera Bread (NASDAQ: PNRA)," says Michael Cintolo in The Cabot Top Ten Report.

"In restaurant parlance, 'fast-casual' eateries are higher priced than fast-food chains such as McDonald's and KFC, but cheaper than casual dining restaurants such as Applebee's and Denny's.