Ad revenue worries knock Google

Fears a slowing US economy may be hitting Google have led analysts to cut the share price target for the firm.

The move came after research firm Comscore reported a sluggish January in the viewing of paid-for-advertisements on the Google site.

The total clicking on to Google's paid adverts was 532 million, down from 533 million a year before, Comscore said.

UBS cut its price target from $650 to $590, and BMO from $690 to $590. Google shares fell 4.57% to $464 on Tuesday.

Its shares reached a peak of $747.24 in early November 2007 and were just below $700 as 2008 began.

However, now it appears that shares in Google may be getting dragged down by the sluggish US economy.