If you're an aggressive trader who wants to get in during what appears to be the early stages of a reversal, these are the sectors you should focus on.

Carl Icahn, the gunslinger of private investors, once made an investment in more than 75 million shares of Yahoo! Inc. (NASDAQ: YHOO). Now Icahn is doubling his investment position in Lawson Software Inc. (NASDAQ: LWSN) to about 8.54% of Lawson's stock outstanding.

The aircraft production cycle is in full swing as Boeing and Airbus build out their fleets of new planes. The major companies involved in this high-revenue effort are in the fund iShares Aerospace/Defense (ITA), but it's useful to own a few individual companies as well. Today let's take a look at Goodrich (GR), a leading supplier of components, systems, and services to the commercial aviation and aerospace defense industries. The company is underappreciated and undervalued, so you should learn more about it.

Asda, the British retail chain owned by Wal-Mart Stores, Inc. (NYSE: WMT), has agreed to purchase the 193 UK stores of Denmark's Netto for $1.2 billion. The move is a first for both Asda and Walmart into the small footprint space that UK shoppers appear to prefer. An average Asda store has around 46,000 square feet of space, while the Netto stores have an average of just 8,000 square feet.

Pantene, the hair care line that generates $3 billion for personal products giant Procter and Gamble (PG), is no stranger to makeovers. And after the recession drove consumers into the arms of cheaper rivals, Pantene is reinventing itself yet again – the third rebranding since 1999 – in an effort to reconnect with consumers.

The US Department of Justice has started looking into complaints that Apple, Inc.'s (NASDAQ: AAPL) iTunes and related business practices in the music industry may be anti-competitive. The Apple inquiries are not yet a formal investigation of AAPL stock, but a move to find out whether or not a formal investigation by the Justice Department should be initiated into Steve Jobs and company.

Who's really worse, BP plc (BP) or Goldman Sachs (GS)? Consumers have plenty of reasons to be down on both companies right now. Energy giant BP is up to its elbows in oil as a deepwater well on the ocean floor continues to spew oil over a month after the initial failure, and Goldman is currently under investigation for allegedly peddling investments while at the same time profiting from those investments' failures.

Toll Brothers Inc. (NYSE: TOL) reported earnings today, with an EPS loss of -$0.24 this morning, a bit worse than the consensus estimate of -$0.23. Revenues also missed estimates of $321.94 million, coming in at $311.3. Still, TOL stock is up more than 4.5% in early trading after earnings. Other home builders like Beazer Homes USA Inc. (NYSE: BZH), KB Home (NYSE: KBH), Lennar Corp. (NYSE: LEN), and PulteGroup, Inc. (NYSE: PHM) are also riding Toll Brother's coattails. The SPDR S&P Homebuilders ETF (NYSE: XHB) is also gaining. All are up anywhere from about 2.5%-4% after Toll Brothers earnings.

Investment in dividend stocks has come back into favor among trading strategies now that the stock market has gotten rocky in May. A high dividend yield allows your investment to keep paying you even if the stock moves sideways -- or even if your dividend paying stocks roll back a bit. The best dividend stocks are not necessarily investments that will see soaring share prices overnight but rather pay reliable dividends and offer a high yield no matter what happens in the stock market.

An analyst at Goldman Sachs has raised his rating on shares of Sprint Nextel Corp. (NYSE: S) to 'Buy' and raised his price target from $3.50 to $6/share. Sprint shares are up about 10% so far today on higher than average volume. Sprint also got some pixels in Barron's, which is looking at the company's coming rollout of its 4G network next month as a move that will attract new customers and convince current customers to stick around. The 4G network is being built-out with help from Clearwire Corp. (NASDAQ: CLWR), and will beat competitors Verizon Communications (NYSE: VZ) and AT&T (NYSE: T) to the 4G finish line by at least a year.

The Greece debt crisis as well as budget woes in other so-called PIIGS nations in the euro zone -- Portugal, Ireland, Italy, Greece and Spain – have dominated the news and dominated European stocks markets. The resulting affect of Greece debt problems on euro zone stocks traded in the U.S. as ADR shares has been dramatic, especially among companies like the Bank of Ireland (IRE), National Bank of Greece (NBG), Deutsche Bank (DB) ABB Inc. (ABB), Deutsche Telecom (DT), and Total SA (TOT).

Stock investing is difficult in this volatile stock market, and low risk trading strategies seem to be key. Finding the best stocks to buy is only half the battle, and limiting your losses is just as important as maximizing your profits. That means the best investment strategy involves investing money in stock picks that pay you no matter what antics the market sends our ways.

The drive toward greater consolidation and a more integrated IT branch has changed IBM Corp. (NYSE: IBM) from a supplier of commodity hardware to the world's leading supplier of integrated solutions for business. Today, the company spent $1.4 billion to purchase Sterling Commerce in a buyout from AT&T (NYSE: T). Sterling makes B2B software that IBM plans to incorporate into its offerings in retail, manufacturing, communications, health care and banking.

Wal-Mart Stores Inc (NYSE: WMT) will use its own fleet of trucks to pick up merchandise at its suppliers and truck it to distribution centers. J.B. Hunt Trucking Services, Inc. (NASDAQ: JBHT), Con-Way, Inc. (NYSE: CNW), and Arkansas Best Corp. (NASDAQ: ABFS) are mostly prepared for this move because they have reduced their less-than-truckload pickups at Wal-Mart distribution centers.

Solar stocks like First Solar (FSLR), SunPower (SPWR) and LDK Solar have had trouble due to earnings and stock downgrades. These alternative energy stocks may have their day in the sun eventually, but it is not a good trading strategy to buy these investments now.

Staples Inc. (SPLS) is a great stock pick for any investment strategy right now. Staples earnings and SPLS sales were strong in a recent report, and trading strategies are favoring Staples stock after earnings.