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.

GeoEye Inc (GEOY) topped the insider-buying charts for the week ending July 9th as insiders snapped up 490,000 shares of company stock at a market value of $19,776,466. During the past six months, insiders have increased their overall holdings in the company by 3.17% and now own 1.15% of GEOY stock.

Transatlantic Petroleum Ltd (TAT) was not far behind, with insiders buying 1,788,640 shares at a market value of $5,008,192. Insiders now own 47.70% of the company's stock after decreasing their overall holdings by 0.12% during the past six months.

Analyst Upgrades

• Baird upgraded Visa (V) to outperform from neutral and raised its target to $100 from $88, citing valuation and an improvement in key trends that include transactions, volume and international travel.
• FBR Capital upgraded Illinois Tool Works (ITW) to outperform from market perform to reflect valuation and expectations for earnings upside in the first half of 2010. The firm raised its target on shares to $58 from $55.
• Goldman added Brookdale Senior Living (BKD) to its conviction buy list based on a bottom in fundamentals and positive senior housing trends. The firm raised its target to $22 from $20.
• Exxon Mobil (XOM) was upgraded to buy from hold at Societe Generale.
• Newfield Exploration (NFX) was upgraded to overweight from equal weight at Barclays.
• PPD (PPDI) was upgraded to buy from hold at Jefferies.

Analyst upgrades:

• Merriman upgraded Sunpower (NASDAQ: SPWRA) two levels to Buy from Sell after transitioning coverage. The firm believes Sunpower is emerging from the current recession as the CleanTech leader and has a $38-$48 price range on shares.
• Citigroup upgraded Varian Medical (NYSE: VAR) to Buy from hold as it believes capex pressure and health care reform uncertainty is priced into shares, and demand will return as hospital budgets stabilize. Citi raised its target on shares to $45 from $36.
• FBR Capital upgraded Gap (NYSE: GPS) to Outperform from Market Perform following the Q2 results to reflect product improvement and ongoing inventory control. The firm raised its target on shares to $24 from $18.
• Schnitzer Steel (NASDAQ: SCHN) was upgraded to Neutral from Sell at UBS.
• UDR Inc. (NYSE: UDR) was upgraded to Market Perform from Underperform at Wells Fargo.
• The Buckle (NYSE: BKE) was upgraded to Buy from Hold at Roth Capital.