Adam Levine-Weinberg

NVIDIA has underperformed the market for the past couple of years, as profitability has been pressured by high research and development costs. However, the market is overlooking the extent of the company's long-term opportunity, and the stock seems significantly undervalued.

J.C. Penney has performed poorly during Johnson's time as CEO. However, you can't say he's been overpaid -- on a net basis, he hasn't been paid at all!

After making amazing progress in the past five 10 years, the smartphone market may be reaching a dead end.

Investing in great companies at good prices is always a good strategy, but it sometimes pays to go "Dumpster diving" for stocks that are out of favor with Wall Street.

The retailer soared 16% on Thursday following news that Samsung Experience Shops will open in more than 1,400 Best Buy locations. While this partnership will be good for both parties, is Best Buy stock too pricey?

Another month of mediocre sales results suggests Walgreen is retaking market share it lost during last year's dispute with Express Scripts.

Airline stocks significantly outperformed the market in the first quarter of 2013. However, three of the biggest U.S. carriers have released discouraging reports in the last week. Does this mean the party's over for airline investors?

Hewlett-Packard was downgraded to "sell" by Goldman Sachs on Tuesday. However, the company has seen improving fundamentals in its printing business, arguably HP's most important franchise.

GM is about to launch its next generation pickup trucks. Will anticipation of the new 2014 models hurt sales of the 2013 pickups and leave GM with too much old inventory?

Ford achieved record sales of its Fusion midsize car last month, with more than 30,000 units sold. Demand for the Fusion is so high right now that the model is likely to remain in short supply until Ford can get its second assembly line (at the Flat Rock Assembly Plant) up and running later this year.

Criticism of Apple's warranty policies in Chinese state-owned media has led some analysts to wonder whether a broad consumer backlash against the company in China could dent earnings. Was Tim Cook's speedy apology enough?

Last week, Dell filed a proxy statement that presented a fairly dismal outlook for the company's business. The recent bidding war to buy the company has driven Dell's stock price up, but the new information provided by the company shows that there is more downside than upside from here.

With American Airlines and US Airways poised to merge, there is a strong possibility that the two carriers will be forced to sell off some of their slots at Washington's Reagan National Airport. This could have a beneficial effect on competition at the airport by allowing low-cost carriers like Southwest and JetBlue to expand their presence.

BlackBerry reported earnings last week. Not only did the company beat estimates on the bottom line, it also achieved success in three critical metrics: Z10 unit sales, conquest rate, and balance sheet strength.

United Continental announced Thursday after the market closed that Q1 and full-year non-fuel unit costs would rise more than previously expected. The continuing cost pressure at United will make it very difficult for the company to meet analyst profit estimates this year.

Last month, Dillard's approved a $250 million share repurchase program for the fifth time in the past three years. However, most of the repurchase authority will probably remain unused until 2014.

Last week, Mercedes-Benz introduced the B-Class Electric Drive, which is powered by a Tesla electric drivetrain. While this is a nice win for Tesla, its significance pales in comparison to the importance of building a market for the Model S sedan and the upcoming Model X crossover.

Has industry consolidation led to higher ticket prices? Or are widespread fears of rising fares overblown?

The yen's recent drop against the dollar has given Japanese automakers a cost advantage relative to their North American competitors. What does this mean for auto investors?

The "ultra-low-cost carrier" -- the ULCC -- is the most-recent innovation in the U.S. airline industry. All three major ULCCs in the U.S. are good investment candidates today: Spirit, Allegiant, and Republic Airways.