[olihb]

I'm sure that plenty of hedge funds were using these feeds (blogs, twitter, etc.) for years.

They just kept their mouth shut because it's foolish to broadcast that you have an edge on your competitors... I bet that since it's out in the open, it's now obsolete...

[hugh3]

I heard about a startup which was doing this a couple of years ago via the VC who had invested in it. It's no big secret.

[olihb]

I heard about that on a forum a while ago, but my point was that when you find a novel way to profit from the stock market you keep your mouth shut.