As the online advertising spends going up in the whole world, Yahoo! predicted a slowdown in online advertising growth in Q3 compared with Q1 & Q2 this year. Yahoo!’s CEO Terry Semel described Automotive and Financial services as particularity weak growth sectors even that Nielsen/NetRatings AdRelevance reported that financial-services companies were the largest online advertisers last month, accounting for 28% of online display ads.

According to eMarketer, an e-commerce-analysis firm, online advertising spending in USA reached 12.5 billion US$ last year and is expected to reach 16.7 billion US$ this year. Yahoo! expectations for this year’s third-quarter sales is the hit 1.11 to 1.22 billion US$. The internet’s share of global online-advertising budgets is expected to rise to 8.3% in 2012 from 3.7% in 2005, Merrill Lynch & Co. Analyst Justin Post wrote in a Sept. 12 report.