Market efficiency is too big a topic here, but there are plenty of inefficient markets - like popcorn in movie theatres.

Wal-Mart could also introduce much greater competition to the marketplace by pushing the concept of discounts into what has traditionally been an inefficient market.

Their complexity often provides a competitive advantage in the race to exploit inefficient markets.

Even on its best days there have been the wild swings that characterize an inefficient market populated by traders with little idea of the stock's real value.

Studies showed inefficient markets in 2006.

This is still an incredibly inefficient market.

However, irrational behavior by the betting public, be they stock investors or horseplayers, will cause inefficient markets.

"I've always been intrigued by inefficient markets."

The result, he said, "is a very inefficient market with prices all over the place."

Early on, he said, he was "a student of inefficient markets," which took him from existing real estate to development to distressed corporations.