Facebook stock sinks without underwriter support

Without that same level of defense, its shares fell $4.64 to $33.67 in the first minutes of trading. That represented a decline of more than 12 per cent from Friday's close and about 24.4 per cent from the intra-day high of $45 a share. Volume was again massive with more than 52 million shares trading hands in 15 minutes. Nearly 581 million shares were traded on Friday in the five or so hours that the stock was open.