Investors added $20 billion to Google’s market cap the first week after the launch of Google+ on June 28. A Morgan Stanleydowngrade on Friday, brought the total down to $15.8 billion because of doubts whether Google will indeed be able to capitalize on new products such as Google+. But somewhere in between there, give or take a few billion, is how much more the market thinks Google is worth than before the launch of Google+, as Techcrunch report.
On June 27 (the day before the announcement), the stock closed at $482.80. It rose to a high of $546.60 on July 7, for a $20.6 billion gain to its market cap (with 322.25 million hares outstanding). Then the stock dropped to $532 at Friday’s close.