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.

GTx Inc. (GTXI) topped the insider-buying charts for the week ending July 9 as insiders snapped up 5,467,860 shares of company stock at a market value of $15,310,008. During the past six months, insiders have increased their overall holdings in the company by 2.72% and now own 71.44% of GTXI stock.

MOST NOTEWORTHY: GTX Inc, Akeena Solar and NexMed were today's noteworthy initiations:

• Rodman & Renshaw is positive on GTX Inc's (NASDAQ: GTXI) opportunity for Acapodene in prostate cancer and Ostarine for muscle wasting. The firm started shares with an Outperform rating and $22 target.
  
• Akeena Solar (NASDAQ: AKNS) was initiated with a Buy rating at Merriman. The firm believes the company is positioned to generate a high margin recurring revenue stream through the licensing of its Andalay proprietary rack mounting system.
  
• Roth Capital expects NexMed's (NASDAQ: NEXM) Phase III data for its antifungal Lamisil, expected in mid-2008, to be positive. The firm, which started NexMed with a Buy rating and $2.50 target, said early clinical data demonstrated a roughly 7-8X improvement in fungal reductions versus the competitive topical formulation sold as Penlac. The analyst said Phase III trial will admittedly have a different end point, but this data makes them bullish.

OTHER INITIATIONS:

• Lehman initiated Liberty Entertainment (NASDAQ: LMDIA) with an Overweight rating and $30 target.
  
• Canaccord Adams assumed Priceline.com (NASDAQ: PCLN) with a Hold rating and $120 target.
  
• Home Inns (NASDAQ: HMIN) was started at Morgan Stanley with an Overweight rating and $28 target.

MOST NOTEWORTHY: Xilinx, Inc (XLNX), Red Robin Gourmet Burgers, Inc (RRGB), Ingram Micro Inc (IM), Silicon Laboratories (SLAB) and Comtech Group, Inc (COGO) were today's more noteworthy initiations:

• Deutsche Bank believes upside remains on Xilinx Inc's (NASDQ: XLNX) margins and tax rates, initiating shares with a Buy rating and $38 target.

• JP Morgan waits for improved new unit volumes and better earnings visibility before getting more constructive on Red Robin Gourmet Burgers Inc (NASDAQ: RRGB) and initiated shares with a Neutral rating.

• Given the lack of catalysts to improve margins above their peers, JP Morgan doesn't expect multiple expansions from Ingram Micro (NYSE: IM) in the near-term, assuming shares with a Neutral rating.

• Deutsche Bank expects Silicon Labratories (NASDAQ:: SLAB) multiples to expand with operating margins, starting shares with a Buy rating and $40 target.

• Needham believes Comtech Group Inc (NASDAQ: COGO) is uniquely leveraged to benefit from the growth of manufacturing in China and started shares with a Buy rating and $21 target...

OTHER INITIATIONS:

• Deutsche Bank initiated shares of Marvell Technology Group (NASDAQ: MRVL) with a Buy rating.

• Citigroup started GTx, Inc (NASDAQ: GTXI) with a Buy rating.

• Pacific Growth started Itron, Inc (NASDAQ: ITRI) with a Buy rating.

• First Marblehead Corp (NYSE: FMD) was initiated with a Hold rating and $38 target at Sandler.

• UBS started Kaiser Aluminum Corp (NASDAQ: KALU) with a Buy rating and $100 target.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).