If you are looking for clues to tell 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.

Mattson Technology (MTSN) topped the insider-buying charts for the week ending Feb. 25 as insiders snapped up 5,000,000 shares of company stock at a market value of $12,350,000. During the past six months, insiders have increased their overall holdings in the company by -6.49% and now own 0.14% of MTSN stock.

It was September 29 when I last wrote about GameStop (GME) in Chasing Value: Are GameStop's Days Numbered? At that time I strongly believed "The demise of GameStop is not imminent -- but it's inevitable." My opinion of this outlet for new and used video games has indeed changed since that time.

I now believe even more fervently that GameStop the gamer is a goner. If you own it, you are playing a game of chicken to see if you make a few bucks with GME as it bounces up and down before it sinks. A word of caution is in order: timing the market as a strategy is a losing proposition the majority of the time.

Last week's column gave five questions for investors to ask before they buy or sell a stock. Here are five more to help start any research. They'll help save a lot of time and more important, money and loss of sleep.

6. What is Price to Book? This measures the price you pay compared to the amount of equity that's in the company. Equity is all the money investors have put in plus all the profits. When you can find a company that is selling for a Price to Book of less than 1, it means you are buying the equity in the firm for less than it's worth. It's like buying $1 for less than a dollar. Hard to find these stocks? Not now in the Financial sector. Look at Bank of America (BAC). It's Price to Book is 0.54. That means you're paying 54 cents for every $1 of equity. Of course, investors think there could be many more charges against that equity before the bank stabilizes, but if they're wrong, an investor might be picking up a real bargain here. Other examples: JPMorgan Chase (JPM) at 0.89; Citibank (C) at 0.74.

It was only a month ago I wrote a story comparing Oracle Corp. (ORCL) and Hewlett Packard (HPQ), concluding the latter to be the better opportunity from a value investor's perspective. At the time Oracle was $27.49. Yesterday it closed at a new 52-week high of $29.23 -- a gain of 6.33%.

During this time, Oracle insiders have been selling shares and the trend is negative. In September alone, almost $300 million of the stock was sold off. If you examine Barron's weekly summary of insider activity, as one source, you will find that Oracle has been in the top five companies on the sell side for many weeks. As the stock has been rising, insiders have been selling into strength.

Delta Air Lines (DAL) CEO Richard Anderson recently made a cool $1.3 million by selling 100,000 shares of his company's stock at an average price of $13.47 per share. Obviously, this was a nice payday for Anderson, but should this stock sale be a red flag for Delta investors?

Analysts and traders love to watch insider stock transactions because they believe it will give them insight into the health of the company. If insiders are buying stock in their own company, it is viewed as a bullish sign for the company. If insiders are selling stock in their own company, it is often viewed as a bearish sign for the company. After all, who has more information about how well the company is doing than the CEO or some other member of senior management, right?

Unfortunately, it's not that cut and dry.

Manpower (MAN - option chain) stock is trading lower today after the company disclosed via SEC filings that MAN executives had sold a total of 134,750 shares of MAN stock in the past week. If you think this stock won't be rising too far in the coming months, then it could be a good time to look at a bearish hedged play on MAN.

This morning, MAN opened at $57.68. So far today the stock has hit a high of $58.16 and a low of $56.78. As of 11:55, MAN is trading at $57.00, down $1.86 (-3.2%). The chart for MAN looks neutral and S&P gives MAN a neutral 3 STARS (out of 5) hold ranking.

Corning (GLW - option chain) stock is trading lower Monday on reports of some high-level insider selling. Chairman and CEO Wendell Weeks sold over 200,000 shares of the stock last Thursday, according to an SEC filing, while Company COO Peter Volanakis also about 80,000 shares on the same day. While Weeks regularly cashes in some of his stock each quarter, this recent amount is bigger than any in the past year. Traders could be reacting to this perceived lack of confidence in the stock by management today.If you think this stock won't be rising too far in the coming months, then it could be a good time to look at a bearish hedged play on GLW.

This morning, GLW opened at $18.29. So far today the stock has hit a high of $18.29 and a low of $17.51. As of 12:55, GLW is trading at $17.58, down 71 cents (-3.9%). The chart for GLW looks bullish and S&P gives GLW a positive 4 STARS (out of 5) buy ranking.

Netflix (NASDAQ: NFLX - option chain) stock is trading lower today after the company reported some recent insider selling. According to SEC filings, NFLX Director Gregory Strangre sold over 19,000 shares of NFLX on Wednesday for $54.48 per share. He and other insiders have combined to sell more than $2.2M of NFLX stock in the past week, which could be interpreted as a bearish sign for the company. If you think this stock won't be rising too far in the coming months, then it could be a good time to look at a bearish hedged play on NFLX.

This morning, NFLX opened at $54.96. So far today the stock has hit a high of $55.84 and a low of $54.00. As of 11:50, NFLX is trading at $55.26, down $1.13 (-2.0%). The chart for NFLX looks bullish and S&P does not currently have a STARS rating for NFLX.

The market takes an upward turn, and the insiders head for the exits.

In the wake of the largest stock market rally in 71 years, according to Bloomberg, the sale of insider shares has reached its most aggressive levels in the past two years. Insiders of companies in the S&P 500 were net sellers for 14 weeks in a row. Six people at Amgen (NASDAQ: AMGN), for example, sold $8.2 million in company stock.

McDonald's (NYSE: MCD - option chain) Vice Chairman and CEO James Skinner sold 150,000 shares of the stock on the open market last week. That equates to $8.0M of selling against only a scant $269K of insider buying in the past three months. If you think this stock won't be rising too far in the coming months, then it could be a good time to look at a bearish hedged play on MCD.

This morning, MCD opened at $54.34. So far today the stock has hit a low of $53.75 and a high of $54.46. As of 11:55, MCD is trading at $54.02, down $0.18 (-0.3%). The chart for MCD looks bullish and S&P gives MCD a positive 4 STARS (out of 5) buy ranking.

UnitedHealth Group (NYSE: UNH - option chain) stock is falling today after Chairman of the Board Richard T. Burke sold 100,000 shares of the stock on the open market last Friday. That equates to $2.9M of selling against no insider buying in the past two months. If you think this stock won't be rising too far in the coming months, then it could be a good time to look at a bearish hedged play on UNH.

This morning, UNH opened at $27.06. So far today the stock has hit a low of $26.37 and a high of $27.80. As of 11:30, UNH is trading at $26.98, down $0.61 (-2.2%). The chart for UNH looks bullish and S&P gives UNH a positive 4 STARS (out of 5) buy ranking.

Has anybody else out there noticed that Jeff Bezos, CEO of Amazon.com (NASDAQ: AMZN), recently sold $135 million of his stock? Not to worry, these are his regular 10b5 plan sales that are pre-scheduled with the SEC. Just smart diversification I suppose.

Normally, I would think this is not that big a deal since he owns billions of dollars of the stock as the single largest shareholder. If I were him, I would be selling too, in particular because I have felt that AMZN is overpriced for quite a while. (See Serious Money: AAPL, AMZN, GOOG, ISRG -- at what Price?)

The stock jumped early this month when Amazon announced the retirement of debt and a stock buyback plan over the next two years. This was a temporary affect; the stock has been trading in the low $70's recently, give or take a few bucks.

But what strikes me as curious is that this buyback plan is announced while insider selling has rarely been higher! The buyback and Bezos selling inspired me to look at the latest insider trading. When I checked it out I discovered company directors, officers, and "affiliated persons" have all been sellers and only sellers. To be fair some of the sales are listed as 'planned'; however, the plan does not have to be filed very far in advance, so I am not impressed by this.

Best Buy Co. Inc. (NYSE: BBY) stock is falling this morning after one of the company's directors sold 10,000 shares of BBY common stock on Friday under a prearranged trading plan. This news, combined with investors' worries that lower-end shoppers are putting off discretionary purchases to keep covered on everyday staples, is pushing BBY down this morning. If you think this stock won't be rising too far in the coming months, then it could be a good time to look at a bearish hedged play on BBY.

After hitting a one-year high of $55.59 last December, the stock hit a one-year low of $41.85 in August. As of 11:05, BBY is trading at $50.87, down 86 cents(-1.7%). The chart for BBY looks bullish and steady, while S&P gives the stock a very positive 5 STARS (out of 5) strong buy rating.

For a bearish hedged play on this stock, I would consider a January bear-call credit spread above the $57.50 range. A bear-call credit spread is an options position that combines the purchase and sale of call options to hedge risk in case the stock doesn't do what you think but still leverage nice returns. For this particular trade, we will make an 8.7% return in 7 weeks as long as BBY is below $57.50 at January expiration. Best Buy would have to rise by more than 12% before we would start to lose money.

BBY hasn't been above $56 at all in the past year and has shown resistance around $52 recently. This trade could be risky if the holiday season turns out to be a big one for electronics and gadgets, but with increasing energy prices and dropping home values, consumers may not have too much discretionary income to spend on holiday presents.

Brent Archer is an options analyst and writer at Investors Observer. At publication time, Brent neither owns nor controls positions in BBY.

Back in June, the Disciplined Investor was poking fun at the prodigious rate at which Crocs (NASADQ: CROX) insiders were dumping stock as the media hyped the company's prospects. In a satirical letter to the company's shareholders on behalf of the CEO, Andrew Horowitz wrote:

As for me, I still support the stock. I see no reason why it cannot double from here. I am feeling generous and want to give back to those who have helped me....With all of the supporters and bulls looking for shares to go to $150, I want to make sure there are plenty of shares available for those who have not yet been able to capitalize. So selling a large portion of my shares is merely an altruistic move to allow these that do not have shares the ability to now have access at these inflated prices. Why should I be so greedy? Since I have sold about 600,000 shares and now have a smaller position (234,243 shares held directly) I fell much better that I have allowed others to enter the "Crox Club". Now there are 600,000 more shares available for others to buy. I really feel good about this.

Now we're in November. Shares of Crocs have taken a hit, losing nearly half their value since the beginning of the month. And predatory securities lawyers have rushed to the scene, filing class-action lawsuits against the company, filled with vague allegations of securities fraud. Given that nearly every company that has the nerve to report a bad quarter gets sued these days, I'm not inclined to read much into the lawsuits.

Under Armour, Inc. (NYSE: UA) has been falling for the past week after disclosures of insider trading. Chairman and CEO Kevin Plan sold 1.5 million shares last week for almost $90 million. Two of Under Armour's senior vice presidents, Kip Fulks and Scott Plank, also sold 15,000 shares and 850,000 shares respectively last week. Total insider sales over the past month have reached $130.6 M. The insider sell-off causes concern for shareholders despite UA's positive earnings report last month. If you think this stock won't be rising too far in the coming months, then it could be a good time to look at a bearish hedged play on UA.

After hitting a one-year high of $73.40 in August, the stock has declined over the past three months. This morning, UA opened at $48.20. So far today the stock has hit a low of $45.00 and a high of $48.20. As of 11:15, UA is trading at $46.78, down $1.82 (-3.7%). The chart for UA looks are bearish and steady, while S&P gives the stock a positive 4 STARS (out of 5) buy rating.

For a bearish hedged play on this stock, I would consider a January bear-call credit spread above the $65 range. A bear-call credit spread is an options position that combines the purchase and sale of call options to hedge risk in case the stock doesn't do what you think but still leverage nice returns. This particular trade will make a 4.2% return in less than 3 months as long as UA is below $65 at January expiration. Under Armour would have to rise by more than 49% before we would start to lose money.

UA has never been above $65 for more than a few days at a time and has shown resistance around $60 recently. This trade could be risky if the holiday season turns out to be a big one for retail, but that looks to be an overly optimistic view at this point. Plus, this position could be protected by strong resistance UA has formed around $64, where the stock topped in late October.

Brent Archer is an options analyst and writer at Investors Observer. At publication time, Brent neither owns nor controls positions in UA.