If you are looking for clues to tell you which stocks have a good chance of increasing in value, you might want to consider watching what insiders are doing. After all, talk is cheap, but when insiders put their own money on the line, you should sit up and take note.

U.S. Gold (UXG) topped the insider-buying charts for the week ending March 4 as insiders snapped up 3,067,000 shares of company stock at a market value of $19,935,500. During the past six months, insiders have increased their overall holdings in the company by 30.97% and now own 21.13% of UXG stock.

Analyst Upgrades

• Intel (INTC) was upgraded to overweight from equal weight and Autodesk (ADSK) to equal weight from underweight at Morgan Stanley.
• Citigroup upgraded Blackrock (BLK) to buy from hold.
• 99c Only Stores (NDN) was upgraded to buy from hold at Deutsche Bank.
• PetSmart (PETM) was upgraded to overweight from equal weight at Barclays.
• Piper Jaffray upgraded Ruth's Hospitality (RUTH) and Morton's Restaurant (MRT) to overweight from neutral.
• BioMed Realty (BMR) was upgraded to market perform from underperform at FBR Capital.
• Wells Fargo upgraded Piedmont (PDM) to market perform from underperform.

If you are looking for clues telling you which stocks have a good chance of increasing in value, you might want consider watching what insiders are doing. After all, talk is cheap, but when insiders put their own money on the line, you should sit up and take note.

American Eagle Outfitters Inc. (AEO) topped the insider-buying charts for the week ending July 9th as insiders snapped up 500,000 shares of company stock at a market value of $6,790,000. During the past six months, insiders have increased their overall holdings in the company by 3.91% and now own 8.30% of AEO stock.

Six Flags Inc. (NYSE: SIX) disclosed in an SEC filing today that unless it can restructure its debt, it may have to file for bankruptcy.

"Given the current negative conditions in the economy generally and the credit markets in particular, there is substantial uncertainty that we will be able to effect a refinancing of our debt on or prior to maturity or the PIERS prior to their mandatory redemption date," the company said.

Analyst upgrades:

• William Blair raised Quest Diagnostics (NYSE: DGX) to Outperform from Market Perform. The firm believes that the long-term fundamentals of the clinical laboratories sectors are still strong.
  
• UBS upgraded Massey Energy (NYSE: MEE) to Buy from Neutral on valuation.
  
• ArthroCare (NASDAQ: ARTC) was upgraded to Buy from Hold by Lazard, since the firm expects a small restatement while they believe a large restatement is priced into the shares.
• Arch Coal (NYSE: ACI) was upgraded to Buy from Neutral by UBS.
• Merrill Lynch raised Southern Peru Copper (NYSE: PCU) to Neutral from Underperform.

Analyst downgrades:

• Piper downgraded Salesforce.com (NYSE: CRM) to Neutral from Buy to reflect the company's lower than expected deferred Q2 revenue.
• Goldman Sachs removed Amylin Pharmaceutical (NASDAQ: AMLN) from its Conviction Buy List.
  

Analyst initiations:

• Aetna (NYSE: AET) was initiated with a Buy by Banc of America, which believes the company will experience industry-leading member growth.
  
• Banc of America initiated Wellpoint (NYSE: WLP) with a Buy rating, as the firm expects the shares to rebound from near trough valuations.
  
• Wachovia (NYSE: WB) was reinitiated by Friedman Billings with an Underperform rating, as the firm expects the company to incur higher credit losses than the Street expects due to its outsized exposure to residential real estate.
  
• Six Flags (NYSE: SIX) was started with an Above Average rating by Caris.

Investors/readers have probably already heard all of the bad jokes regarding Six Flags.

• "Things are so bad at Six Flags, it's now called Three Flags."
• "The only thing rising at Six Flags is the rollercoaster."
• "A contest offered a vacation prize. First Prize: a day at Six Flags. Second Prize: two days at Six Flags."

O.K., that last one was borrowed from arguably the greatest comedian of all time, Groucho Marx, but you get the point: times are tough for Six Flags (NYSE: SIX).

Six Flags has more than $2.4 billion in debt, hasn't posted a profit in years, and has a big hurdle next summer: a $288 million payment to preferred shareholders, The Wall Street Journal reported (subscription required). Six Flags' stock closed Friday down 10 cents to $1.02.

Attendance, down 3% in Q2, is expected to "decline by at least that percentage, or come in even lower" for the year stock analyst C. Leonard Bauer told BloggingStocks, adding that it's not an elaborate mystery concerning why Six Flags is becoming less of a destination of significance.

With a turn of the calendar page, we drift into the middle portion of the current quarter, but the earnings season rolls on. Among the many companies scheduled to report quarterly results this coming week are Time Warner Inc. (NYSE: TWX), Cisco Systems Inc. (NASDAQ: CSCO), News Corp. (NYSE: NWS), and Whole Foods Market International (NASDAQ: WFMI). Let's take a look at which companies Wall Street analysts are expecting to be among the top earnings gainers and decliners this week.

Analysts surveyed by Thomson Financial expect the following to report strong earnings growth when compared to the same period of the previous year.

• DRS Technologies Inc. (NYSE: DRS): $0.85 EPS (+95.3%) on revenue of $823.8 million (+12.0%)
• Integrys Energy Group Inc. (NYSE: TEG): $0.40 EPS (+70.0%) on revenue of $2.6 billion (+9.7%)
• Cimarex Energy Co. (NYSE: XEC): $2.53 EPS (+64.4%) on revenue of $599.9 million (+75.4%)
• Forest Oil Corp. (NYSE: FST): $1.51 EPS (+55.6%) on revenue of $456.1 million (+79.1%)
• Devon Energy Corp. (NYSE: DVN): $3.28 EPS (+48.5%) on revenue of $4.1 billion (+38.5%)
• CMS Energy Corp. (NYSE: CMS): $0.13 EPS (+46.2%) on revenue of $1.4 billion (+6.7%)
• Transocean Inc. (NYSE: RIG): $3.23 EPS (+43.0%) on revenue of $3.1 billion (+112.9%)
• Sara Lee Corp. (NYSE: SLE): $0.26 EPS (+38.5%) on revenue of $3.5 billion (+8.9%)
• Williams Companies Inc. (NYSE: WMB): $0.69 EPS (+37.7%) on revenue of $3.4 billion (+20.0%)
• Harris Corp. (NYSE: HRS): $0.99 EPS (+28.3%) on revenue of $1.4 billion (+18.0%)

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

• Analogic Corp. (NASDAQ: ALOG) beat estimates and announced an acquisition.
• AnnTaylor Stores Corp. (NYSE: ANN) swung to a loss in the fourth quarter on restructuring costs.
• Big Lots Inc. (NYSE: BIG) beat fourth-quarter earinings estimates and offered revised guidance.
• Bon-Ton Stores Inc. (NASDAQ: BONT) posted disappointing fourth-quarter and full-year results.
• Carrols Restaurant Group (NASDAQ: TAST) posted solid results on same-store sales for certain chains.
• Ferrellgas Partners (NYSE: FGP) saw profit fall in what should have been its strongest quarter.
• Foot Locker Inc. (NYSE: FL) fourth-quarter profit fell on weaker same-store sales.
• Humana Inc. (NYSE: HUM) cut its first-quarter and full-year forecasts on higher expenses.
• Imax Corp. (NASDAQ: IMAX) widened its losses for the fourth quarter and the full year.
• Jones Soda Co. (NASDAQ: JSDA) swung to a loss due to costs related to distributing in product in cans.
• K-Tron International Inc. (NASDAQ: KTII) said fourth-quarter and full-year earnings soared.
• Liz Claiborne Inc. (NYSE: LIZ) posted disappointing fourth-quarter and full-year results.
• Six Flags Inc. (NYSE: SIX) narrowed its fourth-quarter and full-year losses.
• Texas Instruments Inc. (NYSE: TXN) lowered its forecast on fewer orders from a key client.
• United Parcel Service (NYSE: UPS) warned it may miss first quarter estimates due to the slowing economy.
• Vail Resorts Inc. (NYSE: MTN) second-quarter profit slipped due to lack of snow early in the season.

The previous quarter was tough for amusement park operator Six Flags Inc. (NYSE: SIX), which reported a narrowed fourth-quarter loss, as well as for Vail Resorts Inc. (NYSE: MTN), the nation's largest ski resort operator, which said that its fiscal second-quarter profits were affected by a lack of snowfall early in the season.

Six Flags reported a fourth-quarter loss of $132.4 million, or $1.39 per share, compared with a loss of $195.2 million, or $2.07 per share, a year earlier, and a loss of 59 cents expected by analysts surveyed by Thomson Financial. However, the results for the prior-year period included an $89.2 million, or 95 cents per share, loss from discontinued operations.

Revenue for the period that ended December 31 rose 8% to $112.1 million, as park attendance edged up 4% to 2.8 million.

Six Flags reported a full-year loss of $275.1 million, or $2.90 per share, compared with a loss of $327.6 million, or $3.48 per share, in the previous year, and a loss of $2.92 expected by analysts. Annual revenue increased 3% to $972.8 million.

Shares of Six Flags dropped 20 cents, or about 12%, to $1.62 in morning trading.

The roller coasters at Six Flags (NASDAQ: SIX) are fun for the theme parks' patrons, but shareholders of Six Flags have experienced a ride more like The Tower of Terror, a simulated freefall thrill ride. The company reported its second quarter results on Friday, losing $41.8 million from continuing operations, compared with a loss of $39.1 million in the second quarter of 2006, as revenue increased 6%. The loss per share of $.50 was nearly double the consensus estimates.

Mark Shapiro, Six Flags President and CEO, commented: "Although our peak business period occurs in the third quarter, we witnessed encouraging results for the first six months, especially when you consider 4% fewer operating days and unprecedented rain in the state of Texas. The fact that in-park spending and guest satisfaction scores are at an all-time high indicates both the return of families to Six Flags and their approval of the makeover. We are in position for the long-term turnaround we envisioned for our shareholders."

But those shareholders apparently aren't buying it, as the shares shed another 16% on Friday to close at $3.90, after trading over $6 as recently as June. In 1999, the stock was above $30.

So is Six Flags a good deal, with its market cap of under $375 million? In many ways, the company is a lot like Trump Entertainment Resorts (NASDAQ: TRMP), whose shares have tanked after the company failed to find a buyer. Saddled with enormous debt loads (1.4 billion for Trump and 2.65 billion for Six Flags), you have to worry that these companies will be unlikely to make the capital investments necessary to stay relevant in competitive industries. The huge debt service requirements make it difficult for these companies to generate cash and while Six Flags does have a $275 million revolving credit facility, that's not that much considering that the company has lost $200 million in the past 6 months.

I would stay away from these stocks for now. The huge debt loads make them too speculative.

MAJOR PAPERS:

• Kohlberg Kravis Roberts & Co. is planning an initial public offering, following in the footsteps of arch rival Blackstone Group (NYSE: BX), reported the Wall Street Journal (subscription required).
  
• Archer-Daniel-Midland Company (NYSE: ADM) is expected to enter the sugar cane ethanol business in Brazil, including the possible purchase of Cosan, Brazil's largest ethanol producer, reported the Wall Street Journal.

OTHER PAPERS:

• British energy company BP plc (NYSE: BP) will agree to the demands of the Russian government to give up its stake in the $20B Kovykta gas project, reported the U.K. Times.
• From BusinessWeek's "Inside Wall Street" column:
• Bulls and bears argue over where it is time to own Deere and Company (NYSE: DE) stock, some see the stock hitting $150, some believe the party is over.
• Document Security Systems Inc (NYSE: DMC) has nine patented technologies to help protect documents and printed products from brand and security fakers, leading Brookhaven Capital Management to believe it will reach $50-a-share over the next two years.
• WBB Securities believes Cleveland BioLabs Inc (NASDAQ: CBLI) is likely by summer's end to get a U.S. Department of Defense contract for its radiation protection compound called Protectan or CBLB502.

WEBSITES:

• CNN.com reported that a 16-year-old girl had both of her feet severed in an accident on the free-fall ride "Superman Tower of Power" at Six Flags Inc's (NYSE: SIX) Kentucky Kingdom amusement park yesterday.

Daniel Snyder, the super entrepreneur and owner of the Redskins, always thinks big. So, when he took a piece of Six Flags (NYSE: SIX), it was only a matter of time until we saw some big bets.

This week, he did just that. Through his investment firm Red Zone Capital as well as Six Flags, he bought Dick Clark Productions for about $175 million.

OK, this may seem like taking a couple steps back. Isn't Dick Clark kind of passe?

That may be the case but his company has some compelling brands, such as "New Year's Rockin' Eve," The Golden Globe Awards, "So You Think You Can Dance," the American Music Awards and so on.

Basically, Six Flags can leverage these assets in terms of cool events, merchandising, and perhaps even attractions.

And, for $175 million, it does seem like a reasonable bet.

Tom Taulli is the author of various books, including the Complete M&A Handbook and the EDGAR-Online Guide to Decoding Financial Statements.

Summer is upon us, and for those of you who like to invest in companies you can examine up close, this is the perfect opportunity to expense some travel to the nation's amusement parks. For research, of course. One way to judge the quality of these stocks is how nauseous they makes you (in a good way, of course). For example, here are the 2006 top 10 steel roller coasters in the country as rated by The Internet Best Roller Coaster Poll.

1. Superman, Six Flags New England, Springfield, MA (Six Flags Inc., NYSE: SIX)
2. Millennium Force, Cedar Point, Sandusky, OH (Cedar Fair Entertainment Co., NYSE: FUN)
3. Nitro, Six Flags Great Adventure, Jackson, NJ
4. Goliath, Six Flags Over Georgia, Atlanta, GA
5. SheiKra, Busch Gardens, Tampa FL (Anheuser-Busch, NYSE: BUD)
6. Superman, Six Flags America, Baltimore MD
7. Montu, Busch Gardens, Tampa FL
8. Phantom's Revenge, Kennywood Park, Pittsburg, PA (Kennywood Entertainment)
9. Superman, Darian Lake, Buffalo, NY (CNL Income Properties)
10. Dueling Dragons-Fire, Universal Islands of Adventure, Orlando, FL (General Electric, NYSE:GE)

Looking for a way to teach your children about stocks? A few shares in one of their favorite parks might capture their attention!

Stock futures are lower in early morning indicating to a similar start for the stock market ahead of some key economic data due to be released today.

At 8:30 a.m., before markets open, the Labor Department will report February's consumer price index. Economists forecast a 0.3% increase compared to a 0.2% increase in January. Ex-food and and energy, core CPI is expected to rise 0.2% after gaining 0.3% in the previous month. Investors will be watching this inflationary measure closely as the Fed meets to discuss interest rate policy next week. What's more, yesterday's PPI surprise is causing further concerns inflationary pressures are sill strong.

Despite PPI coming much higher than expected yesterday and other indication about mounting inflation (at the wholesale level) and slower economic growth, markets finished on a positive note. The reason, many speculate, has to do with several options and futures contracts expiring today bringing buyers into the market. Corporate M&A activity also helped strengthened stocks yesterday.

Other economic data will be reported today: February capacity utilization and industrial production figures will be released just before markets open. March consumer confidence is due at 10:00 a.m., after the open, and is expected to show a slight drop.

The dollar dropped to a three-months low against the euro ahead of the coming U.S. economic data that could further point to weakening U.S. economy. The dollar also lost ground against the yen and 12 other currencies.
After falling to near $57 a barrel, oil prices rose this morning.

In corporate news:

OMI Corp. (NYSE:OMN), operator of a fleet of oil tankers, may put itself up for sale. The company hired advisers to explore sale and its board is reviewing several strategic alternatives.

Nissan Motor Co. (NASDAQ:NSANY) CEO Carlos Ghosn would give up the duty of overseeing operations in the Americas. The automaker shuffles top management as it heads for its first annual profit decline in seven years.