It wasn't even an announcement, it was a holding page on the Rockstar main site, but that hasn't stopped Battlefield 3 being the second biggest thing this week.
Rockstar's official confirmation of GTA V caused Take-Two Interactive's shares to jump by nearly 7% during the day, closing at $15.22, which is about a 6% rise. 'Shares traded as high as $15.71 during the day, and are going for $15.36 in after hours trading.' reported Gamasutra.
Apparently investors reckon it'll sell rather well. The topic was topping the Twitter trending charts within minutes of Rockstar's release.