KEY POINTS
  • Stifel lowers its rating for Alphabet shares to hold from buy.
  • The firm's analyst is concerned over the company's product search market share and valuation.
A man walks through light rain in front of the Hey Google booth under construction at the Las Vegas Convention Center in preparation for the 2018 CES in Las Vegas, Nevada, January 8, 2018.

Alphabet, the parent company of Google, is facing more business threats from Amazon, according to one Wall Street analyst.

Stifel lowered its rating for Alphabet shares to hold from buy, citing the competition in the advertising and cloud computing markets.