Shares of French drug maker Sanofi-Aventis (NYSE: SNY) have been tumbling more than 5% in morning trading on news that a Swiss drug maker said it expects to receive approval to sell a generic version of Sanofi's anti-clotting agent Plavix.

History is repeating itself. After facing generic competition in the United States to its second-biggest product in 2006, Sanofi-Aventis is now dealing with a similar threat in Europe. Competition concerns came after Switzerland's Schweizerhall Holding AG announced it would launch a copy of the Plavix blood thinner that could be bought for a lower price. Schweizerhall said it expects German regulators to approve its generic version of Plavix, called clopidogrel.

Sanofi-Aventis's fears about generic competition are justified as the company had to fight against a similar situation less than a year ago. Back in 2006, Bristol-Myers Squibb Co. (NYSE: BMY), which develops the product with Sanofi, saw a big plunge in its sales after Canadian generics company Apotex Inc. launched a cut-price copy of the drug.

Shares of radio broadcaster Clear Channel Communications Inc. (NYSE: CCU) were slightly up in early trading after the company posted higher first-quarter profit boosted in part by gains in its outdoor advertising unit. Though, the company was not able to beat analysts' predictions as the weak economy put pressure on the overall advertising market.

Clear Channel Communications announced that its quarterly profit surged to $799.7 million, or $1.61 per share. The income figures were definitely something to cheer about. During its first quarter last year, the company had net income of $102.2 million or 21 cents per share. Excluding one-time items, earnings for the quarter would have been $0.19 per share. Analysts' forecast (which typically exclude one-time items) was for $0.21 per share, according to Thomson Reuters.

The media and advertising display company also said that quarterly revenue rose 3.9% to $1.56 billion, compared with $1.51 billion reported in the same period a year ago, helped by favorable foreign exchange rates; excluding the effect of the week dollar, revenue rose only 1%. Analysts had been expecting to see slower sales of $1.53 billion.

The world's third largest music company, Warner Music Group Corp. (NYSE: WMG), reported this morning a wider second quarter loss and suspended a quarterly dividend to strengthen its balance sheet.

Warner Music posted a quarterly loss of $37 million, dragged down by higher costs and lower compact disc sales. Analysts had expected a loss of 12 cents per share, and were disappointed to see the company report a loss of 25 cents per share.

Warner's quarterly revenue rose only 2% to $800 million compared with $784 million a year ago. The company attributed the revenue decline to its recorded-music segment whose sales climbed only 0.6% due to consumers' preferences for digital music. However, the drop in revenue could have been even worse if the recording company hadn't benefited from the weak dollar, Warner stated. Analysts expected revenue of $780 million, according to Thomson Reuters.

Transocean Inc. (NYSE: RIG), the world's largest offshore drilling contractor, reported its first quarter earnings this morning, and surprised Wall Street by posting a profit that more than doubled for the quarter.

The company said its quarterly profit jumped to $1.19 billion boosted by soaring crude oil prices. The offshore drilling contractor also benefited from strong sales from its acquired competitor GlobalSantaFe Corp. Going into today's earnings announcement, analysts had been expecting the company to post a profit of $3.33 a share, but Transocean surprised everyone by earning $3.80 a share during the quarter. This is a nice rebound from the same period last year when the the world's largest offshore oil driller reported earnings of $2.62 a share.

Looking at revenue, Transocean said its quarterly sales sales more than doubled to $3.11 billion, compared with $1.33 billion in the same period a year ago, helped by strong sales from GlobalSantaFe. Analysts, on average, were expecting the company show $3.05 billion in revenue, according to Thomson Reuters.

Shares of digital television provider DirecTV Group Inc. (NASDAQ: DTV) have been rallying in early trading as its earnings numbers for the first quarter were better than analysts had forecast. The company also announced its board approved an increase in its stock buyback program, raising it to $3 billion.

The company said its first-quarter profit rose 10% to $371 million, helped by higher subscriber additions. DirecTV was able to slightly come in above analyst estimates, with 32 cents per share compared to the forecast 31 cents per share. Compared to its first period last year, earnings were up, as the digital television provider came with earnings of 27 cents a share last year.

The nation's largest satellite-TV company posted a respectable growth of 17% for its first-quarter revenue, which jumped to $4.59 billion compared with $3.91 billion a year ago. This was above analysts' predictions for quarterly revenue of $4.47 billion, according to Thomson Financial.

Over the past year, we have been hearing a lot of bad news about investment banks and insurers. The slumping housing market, credit crunch and subprime mortgage troubles have been leading the headlines, so many of you are probably shying away from financial stocks as almost all the banks have been getting only bad publicity lately.

In the light of those worries about safe investments, CNNMoney is asking us to reconsider our opinions, claiming that there really are some quality stocks in these challenging financial times.

Berkshire Hathaway tops the list, mainly because of its CEO Warren Buffett, who has the experience of surviving previous recessions. While some investors may have impression that the company has a lot of tough times ahead, CNNMoney sees Berkshire with a lot of capital, which could be enough to steer it through the current economic storm. To support this argument, CNNMoney cites Keppler Asset management CIO Michael Keppler, who is convinced that Berkshire will be able to beat the difficult market.

Shares of D.R. Horton Inc. (NYSE: DHI), the largest U.S. home builder, were plunging in premarket after the company reported a large second quarter loss this morning. Its quarterly numbers were dragged down by the slumping housing market which forced the homebuilder to take hefty charges to write down the value of its inventory.

The company reported a loss of $1.31 billion, or $4.14 per share . The income figures were definitely nothing to cheer about. During its second quarter last year, the company had a profit of $51.7 million, or 16 cents per share, but that number was slashed this quarter as the homebuilder took pretax write-down charges of $834.1 million.

Wall Street analysts expected the company to have a quarterly loss of "only" 39 cents per share. So with the actual numbers, D.R. Horton is looking for a pretty bad day in today's session.

It has been a tough year for investors. We have been dealing with recession fears, housing market worries, high gasoline prices and a very weak U.S dollar. As much as we would love to say that the worst is behind us, we still could be in for some more rocky times ahead. So its best to try to figure out which stocks would be best to avoid for the time being.

Richard Gibbons wrote up a nice piece over on The Motley Fool that looks at some of the stocks that we would be wise to stay away from at this time. Regardless good or bad times, he is convinced there are always ways to make money, but in order to find the winners, it is also necessary to pull out the losers.

So how can we separate out the winners from the losers?

Gibbons seems to have a simple answer for this. He believes there is really no use in wasting our time trying to separate the winners from the losers as there are so many great cheap stocks that could offer us a chance to make money. Gibbons' advice is to not choose ugly and risky companies that could put our hard earned money at risk. To makes this clear, he uses a baseball analogy, expressing his options for the curve balls instead of the fastballs.

Tomorrow afternoon Walt Disney Co. (NYSE: DIS) will be answering Wall Street's questions about the strength of its US amusement parks when it reports its second quarter earnings.

The last time that Disney reported earnings was February 5, when the company topped analysts' estimates of 52 cents per share by a whopping 11 cents.

This time, analysts expect earnings of 51 cents a share on sales of $8.51 billion, compared with 43 cents and revenue of $8.07 billion a year earlier. Sales are expected to decline year-over-year as a result of the weak market conditions hurting Disney's theme parks, particularly its Walt Disney World in Florida.

With the current challenging market conditions probably many of us are wondering which are those reliable stocks that could offer us a big profit in the next coming years. In the light of those questions, Gene Marcial's new book, 7 Commandments of Stock Investing, reveals his perspective over seven stocks that are considered to be worth buying and holding for the next seven years (check out BusinessWeek's slideshow of his seven picks).

Taking advantage of the experience he gained over the past 30 years, BusinessWeek's Gene Marcial shares his opinions related to investors' strategy to use market meltdowns for their own benefit, being able to turn the stock market panic into success.

KBR Inc. (NYSE: KBR), an engineering and construction company that was once a unit of Halliburton Co. (NYSE: HAL), reported this morning that profit more than doubled for its first-quarter as the company benefited from a arbitration award gain.

KBR posted earnings for the quarter of 58 cents per share, which was much higher than the 34 cents per share that analysts predicted. The income figures were definitely something to cheer about. During its first quarter last year, the company had a profit of $28 million. That number surged this quarter to $98 million.

Analysts had been expecting revenue of $2.30 billion, but KBR surprised everyone by posting $2.52 billion in sales, a 24.3% increase, during the quarter. This is a nice rebound from the same period last year when the military contractor's sales were $2.03 billion.

Shares of the top maker of photographic film, Eastman Kodak Co. (NYSE: EK), have been tumbling in morning trading after putting up less than impressive earnings.

The company was not able to come in above analyst estimates, despite the fact that its loss narrowed to $115 million, or 40 cents a share in the first-quarter. Compared to its first period last year, its quarterly numbers showed a nice rebound, as the company reported a much higher loss of 53 cents a share last year.The photography products maker improved its performance on digital photography products and services, but this was not enough to offset higher silver and aluminum cost and increased spending on its inkjet printer business.

Going into today's earnings report Wall Street had been looking to see the company show Q1 loss of 3 cents a share. Excluding one-time items, the company stated that it loss came in at 39 cents a share, far more than the loss that analysts predicted. So with the actual numbers, Eastman Kodak is looking for a pretty bad day in today's session.

Health insurer Cigna Corp. (NYSE: CI) reported a plunge of 80% in first-quarter profit this morning. The results were dragged down by deep charges related to its reinsurance business and litigation. The company missed analysts' earnings targets, and also issued a warning for its full-year earnings, sending its shares down in premarket.

For the quarter, Cigna said that its profit dropped to $58 million, or 21 cents per share, compared with $289 million, or 98 cents, reported in the same period a year ago. Excluding one-time items, the insurer's earnings numbers would have come at 94 cents per share, one cent below the average estimate of analysts, according to Thomson Financial .

Looking at revenue, Cigna posted a rise of 4.5% in the quarter on a year-over-year basis. Analysts had been expecting to see revenue of $4.55 billion, while the actual number was slightly higher, at $4.57 billion. The company said that the number of clients who joined its health plans jumped 5.5% to 10.4 million.

Shares of the nation's largest food and beverage maker, Kraft Foods Inc. (NYSE: KFT), have been surging in morning trading despite posting a decline for its first-quarter profit, as its earnings numbers were better than analysts had forecast.

For the quarter, Kraft Foods announced that its profit dropped 13% to $608 million, compared with $702 million a year earlier, dragged down by higher expenses for ingredients. The 2007 earnings results included a one-time interest benefit related to the spin-off from Altria Group Inc. (NYSE: MO). On an adjusted basis, the company posted quarterly earnings of 44 cents per share, slightly higher the 40 cents per share that analysts expected.

The food giant posted solid growth in its first-quarter revenue, which climbed to $10.37 billion, up from $8.59 billion reported in the same period a year ago. Analysts had forecast lower revenue of $9.77 billion in the quarter, according to Thomson Financial. The increase in revenue came as the company benefited from both the weak dollar and gains related to acquisitions.

Shares of the nation's largest automaker, General Motors Corp. (NYSE: GM), have been soaring in premarket despite posting a large first quarter loss, as the company surprised Wall Street by reporting a smaller than expected loss per share.

For the quarter, General Motors said it swung to a loss of $3.3 billion, hurt by continued weakness in U.S., waning demand for its sport utility vehicles, and a supplier strike. The company stated that the strike, which started two months ago at American Axle and Manufacturing Holdings Inc. (NYSE: AXL), came with charges that totaled $800 million, and slashed vehicles production by 100,000.

Weighed down by those costs, GM posted a net loss of $5.74 per share, compared with a profit of 11 cents a share a year-earlier. However, excluding one-time items, the automaker reported a loss of 62 cents per share. Going into today's earnings announcement, analysts had been expecting the company to show a much higher loss of $1.60 per share.