market efficiency

Hunting Investment Alpha and Trading Alpha from Online News, Social Media, and Rumors
Alpha hunters are always looking for new territory. When a strategy becomes known and used by too many players, the collective market impact of getting in and getting out will squeeze out all the profit juice, and only the lowest-cost transactors (large sell-side [...]

Where Does Stock Alpha and Alpha Return Come From?
“Life Is Alpha. The Rest Is Details.” — Popular T-shirt at hedge fund manager events
There was a time not too long ago when, if you posed the question “Where does alpha come from?” to a roomful of academic financial economists, most of them would complain: “It’s a [...]