Yet the price of low-volatility stocks tend to be depressed compared with their high-volatility brethren, notes Haugen.

FORBES: Fiscal Cliff Or Not, Low-Volatility Stocks Tend to Outscore The More Exciting, Highly Volatile Plays Over The Long Haul

Haugen, 54, Bauman, 56, and Caesar were found shot to death at the couple's campsite the following day.

CNN: Couple, loyal dog shot to death on camping trip

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

FORBES: Fiscal Cliff Or Not, Low-Volatility Stocks Tend to Outscore The More Exciting, Highly Volatile Plays Over The Long Haul

Following a 30-year academic career, he founded quantitative investment research firm Haugen Custom Financial Systems, designed mainly for institutional investors.

FORBES: Fiscal Cliff Or Not, Low-Volatility Stocks Tend to Outscore The More Exciting, Highly Volatile Plays Over The Long Haul

Haugen laments that for decades, the financial world has maintained that investors must take on greater risk to achieve greater returns.

FORBES: Fiscal Cliff Or Not, Low-Volatility Stocks Tend to Outscore The More Exciting, Highly Volatile Plays Over The Long Haul

Sights like that motivated Haugen to start a slavery-fighting nonprofit seven years ago called International Justice Mission (IJM), based in Arlington, Va.

FORBES: Hitting Slavery Where It Hurts

Sights like that motivated Haugen to start a slavery-fighting nonprofit seven years ago called International Justice Mission (IJM), based in Arlington, Virginia.

FORBES: Hitting Slavery Where It Hurts

Haugen was a school counselor and track coach, and Bauman taught business.

CNN: Couple, loyal dog shot to death on camping trip

Haugen employs what he describes as a market approach to fight slavery.

FORBES: Hitting Slavery Where It Hurts

Haugen graduated from Harvard in 1985, worked in the antiapartheid movement in South Africa, then earned a law degree at the University of Chicago.

FORBES: Hitting Slavery Where It Hurts

"Justice is a scarce resource in the developing world, " says Haugen.

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Little is expected of these less exciting and little known stocks, says Haugen, so they generally are neglected on Wall Street and ignored by most investors.

FORBES: Fiscal Cliff Or Not, Low-Volatility Stocks Tend to Outscore The More Exciting, Highly Volatile Plays Over The Long Haul

But that price depression usually represents the opportunity for long-term investors to bag higher returns from these neglected stocks than from the more exciting stocks, says Haugen.

FORBES: Fiscal Cliff Or Not, Low-Volatility Stocks Tend to Outscore The More Exciting, Highly Volatile Plays Over The Long Haul

The former Amway distributors thought they'd be exonerated and were shocked by the jury's verdict late Friday, said Randy L. Haugen, one of the defendants, to a reporter.

FORBES: The Devil Didn't Make Them Do It

"The world is full of ugly injustice, " Haugen says.

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Gary Haugen, a onetime United Nations investigator, has witnessed some of the most awful consequences of brutality, from the killing fields of Rwanda and the old South Africa's apartheid system to murders by the Philippine army.

FORBES: Hitting Slavery Where It Hurts

Haugen doesn't even go there.

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