据在线跟踪公司comScore星期三发表的数据显示，微软Bing搜索引擎9月份在美国搜索市场的份额从8月份的9.3%提高到了9.4%。Bing正在稳定地进步，从谷歌那里获取利润丰厚的美国搜索和在线广告市场的份额。

　　微软今年5月末推出了Bing搜索引擎并且投资1亿美元进行广告促销。四个月以来，Bing搜素引擎的市场份额一直在连续温和增长。

　　同时，comScore称，谷歌9月份在美国搜索市场的份额从8月份的64.6%提高到了64.9%。雅虎9月份的市场份额是18.8%，比8月份下降了0.5%。Ask.com和AOL的市场份额没有变化，仍然是3.9%和3.0%。

　　雅虎和微软经过几个月的谈判之后在今年7月末签署了一个为期10年的网络搜索和广告合作协议，为联合攻击谷歌搭建了一个平台。根据这个协议，雅虎将在自己的网站使用微软的搜索引擎，同时提供自己的全球销售队伍推销广告。

　　雅虎与微软的这个协议还要经过美国反垄断管理部门的审查。这个交易预计在2010年年初完成

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