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.

Alliance Healthcare Services (AIQ) topped the insider-buying charts for the week ending July 9 with insiders snapping up 3,707,136 shares of company stock at a market value of $14,683,653. During the past six months, insiders have increased their overall holdings in the company by 0.31% and now own 6.23% of AIQ stock.

MOST NOTEWORTHY: Credit Suisse, Deutsche Bank, ConocoPhillips, Finisar and Cepheid were today's noteworthy downgrades:

• Lehman Brothers downgraded shares of Credit Suisse Group (NYSE: CS) to Equal Weight from Overweight and shares of Deutsche Bank AG (NYSE: DB) to Underweight from Overweight to reflect potential write downs from their U.S. subprime mortgage exposure.
• ConocoPhillips (NYSE: COP) was downgraded to Market Perform from Outperform at Bernstein on valuation.
• Needham lowered shares of Finisar Corporation (NASDAQ: FNSR) to Buy from Strong Buy, as they expect pressure in FY08 as margins recover and opex remains elevated due to patent litigation.
• Cepheid Inc (NASDAQ: CPHD) was downgraded at UBS to Neutral from Buy on valuation.

OTHER DOWNGRADES:

• Calyon downgraded shares of Gol Linhas Aereas (NYSE: GOL) and TAM SA (NYSE: TAM) to Add from Buy.
• Goldman Sachs downgraded Altria Group Inc (NYSE: MO) to Neutral from Buy.
• Morgan Stanley downgraded NeurogesX (NASDAQ: NGSX) to Equal Weight from Overweight.
• Friedman Billings downgraded shares of Brookline Bancorp (NASDAQ: BRKL) to Market Perform from Outperform.