iPad hits stores, NFL labor deadline approaches and Saudi Arabia braces for "Day of Rage." Here's some of what we’re watching – and therefore you should as well.

Day of Rage?: US equity markets plummeted Thursday, the Dow turning in its worst day since August in the latest twist of this seesaw trading week. The focus stays east Friday, as Saudi Arabia is set to see a so-called "Day of Rage"… or will it? A great deal of uncertainty hovers around the long-scheduled event, organized via Facebook. With the Saudi government's ban on protests and troop deployment leading to disputed reports of shots fired to control crowds Thursday, the scope and gravity of this "Day of Rage" are hard to predict. That uncertainty hasn't come to the aid of regional markets with the benchmark Saudi index getting hammered over the past two weeks, while oil remains above $100 a barrel.