If you're worried about these moves, it's time to cash out.
On this battleground, Facebook is making a fortune -- while Twitter is losing a fortune.
It wouldn't surprise me if Whiting has been in contact with its own buyer.
Catch up on Jim Cramer's thinking over the past week about the resilience of the market and misses from some initial public offerings.
Accept the risk you're taking on and, above all, be a grown-up about it.
Cheap money and greed from the Allergan bidder's side are strong incentives.
Here are several themes that are still working -- and now you can get in at a bargain.
Some large account could have liquidated positions yesterday.