Yahoo says to grow operating margin at 15-20 percent pace

Bartz described the current operating margin of 6 pct as "terrible, terrible."

Yahoo, the top U.S. seller of online display ads, will eye growth in Southeast Asian markets such as Indonesia and Vietnam, she said at a lunch talk organized by the American Chamber of Commerce in Singapore.

Microsoft Corp said on Nov 5 its search engine partnership with Yahoo would not be limited to the United States but would be introduced around the world, once it gets regulatory approval.

Microsoft and Yahoo had earlier this year signed a 10-year global Web search partnership to challenge market leader Google Inc, a pact that U.S. and European antitrust regulators are evaluating.

(Reporting by Harry Suhartono and Kevin Lim)