Yahoo (YHOO -7.6%) is now the S&P's leading loser on the day, after reporting...

|By:, SA News Editor

Yahoo (YHOO -7.6%) is now the S&P's leading loser on the day, after reporting lower-than-expected Q2 revenue, mostly from its core display advertising business, and forecasting a weaker Q3. CEO Carol Bartz blames the shortfall on disruption from sales force changes, but there's no way to spin it: It's a "significant disappointment."