Confidence in the world economy waned in February as stimulus packages were slow to revive growth and unemployment climbed, a survey of Bloomberg users on six continents showed.

The Bloomberg Professional Global Confidence Index fell to 8.5 from 8.7 in January. A reading below 50 means pessimists outnumber optimists. Sentiment about Latin America deteriorated the most, while respondents in Asia were the least pessimistic about their region, the year-old survey showed.

Advanced economies are already in a depression and government spending alone won't succeed in dragging the global economy out of its mire, according to International Monetary Fund Managing Director Dominique Strauss-Kahn. Central bank officials say transmission channels for their policy actions are still clogged, delaying the effect of interest-rate cuts.