Among IPOs of tech stocks, Zynga drew a lot of attention, not all of it positive. The first day of trading for the developer of online games was Dec. 16, 2011.
Pricing: $10 per share
First-day close: $9.50, down 5 percent from IPO price
Monday's close: $10.39, up 4 percent from IPO price
Trading range since IPO: $7.97 to $11.50