Amazon.com downgraded to Neutral from Overweight at JPMorgan JPMorgan cut its rating on Amazon.com shares to Neutral from Overweight on concerns the company's gross profit growth will decelerate in 2013. The firm says Amazon's third party sales are likely to moderate while comparisons get tougher. JPMorgan lowered its price target for the stock to $300 from $333. Amazon closed yesterday up 97c to $275.10. :