March figures from comScore show that Yahoo! (YHOO) lost a fair amount of market share in the US during March.

Its share of searches dropped .6% to to 27.5% from 28.1% in February.

Google‘s (GOOG) share rose from from 48.1% to 48.3%. Microsoft (MSFT) rose from 10.5% to 10.9%. Ask.com rose from 5.0% to 5.2% and Time Warner’s (TWX) AOL rose from 4.9% to 5.0%.

Americans conducted 7.3 billion searches in March.

Douglas A. McIntyre