"As soon as it is possible to do so, several North American companies are likely to move quickly to enter Cuba, the greatest untapped opportunity remaining in the western hemisphere," says Jim Powell.

Here, the editor of Global Changes & Opportunities looks at what he believes are the best investment opportunities for investing in Cuba, should such a change occur.

"In August, Raul Castro announced that 500,000 public workers in Cuba will be laid off and will need to find jobs in newly-legalized small private enterprises.

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

• Abercrombie & Fitch Co. (ANF) lower Q3 results still topped expectations and sent shares higher.
• Applied Materials Inc. (AMAT) posted much better-than-expected Q4 earnings, the first profit in a year.
• AstraZeneca (AZN) received an analyst's downgrade due to concerns over its earnings prospects.
• Blackstone Group (BX) received an analyst's upgrade following the company's Q3 results.
• Blockbuster Inc. (BBI) widened its net loss in Q3 and revenue and same-stores sales declined.
• Clean Energy Fuels Corp. (CLNE) shares declined after its Q3 numbers fell short of expectations.
• Consolidated Water Co. Inc. (CWCO) earnings prospects for 2010 earned it an analyst upgrade.

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.

"Wealth building is about buying quality on the cheap; and you're not going to find the best water industry stocks at better prices than they sell for now," says utility sector specialist Roger Conrad.

In his The Utility Forecaster, the advisor reviews the three water stocks that earn a place among the core holdings in his growth portfolio: Aqua America (NYSE: WTR), Consolidated Water (NASDAQ: CWCO) and Southwest Water (NASDAQ: SWWC).

"All three of these water stocks posted disappointing first quarter earnings for very different reasons. However, all remain tapped into long-run, wealth-building opportunities.

"Aqua's first quarter results were by no means a disaster. But they lagged both last year's total and Wall Street estimates.

"Management blamed the slowing economy's impact on housing starts in what had been fast-growing systems, rising bad debt, lower commercial sales, delays in fully digesting acquisitions in the South and longer-than-expected timetables needed to win rate increases.

MOST NOTEWORTHY UPGRADES:

• Brean Murray upgraded Consolidated Water (NASDAQ: CWCO) to Buy from Hold, based on valuation.

• Magellan Midstream Partners (NYSE: MMP) was downgraded to Neutral from Buy by Goldman Sachs.
• Goldman also downgraded TransCanada (NYSE: TRP) to Neutral from Buy.