 Shares of Roblox Corp. RBLX, 0.09 were surging more than 15 in premarket trading Tuesday after the company released December monthly metrics that showed bookings ahead of at least one analysts expectations for the period. Roblox estimates 430 million to 439 million in bookings for the month of December, while Wedbush analyst Nick McKay wrote recently that his implied estimate for the period was for 393.5 million. 