A Look at Zynga and Facebook Lock-Up Expiration Dates

A term that is a lot in the news these days is “lock-up expiration,” particularly with reference to Facebook Inc (NASDAQ:FB), and also to Zynga Inc (NASDAQ:ZNGA).

Lock-up refers to a statutory period of time after an IPO, in which shares held by insiders cannot be offloaded in the market. This is done to ensure that the market is not swamped by too much of a single stock, and helps afford some protection to retail investors, at least in the initial period of the listing.

Both Zynga Inc...