The advantage for the hedge funds in the mortgage market lay in the inefficiency of that market and the lack of such fierce competition as existed in the much larger universe of macro hedge funds.

FORBES: As the Fed Buys Mortgages You Should Too

An investor now has the ability to purchase these stocks and take advantage of the market inefficiency.

FORBES: Panning for Stocks

That would only underline the inefficiency of Germany's energy market.

ECONOMIST: German business

It is because the market was opened up to competition after years of inefficiency and price-rigging.

BBC: Q&A: British Energy's crisis

Broadcast spectrum inefficiency is a legacy of the days when TV had 100% of the wireless market.

WSJ: A Broadcast Spectrum Gold Mine

One of them is Robert A. Haugen, a financial economist best known for his pioneering research on market inefficiency.

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