Graphics of new Amazon Kindle tablets seen at news conference in New York
Graphics of the new Amazon Kindle tablets are seen at a news conference during the launch of Amazon's new tablets in New York, September 28, 2011. REUTERS

(REUTERS) -- Amazon.com Inc shares were downgraded by Morgan Stanley analysts on Thursday on concern about competition from Apple Inc. and slowing sales growth.

Analysts led by Scott Devitt lowered their rating on Amazon shares to equal weight from overweight. Amazon's shares fell 4.1 percent to $176.97 in morning trading.

(Reporting By Alistair Barr; Editing by Maureen Bavdek)

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