It’s official: You can reduce your investment risk simply by chucking darts at a list of stocks, then buying them.

That’s if you believe a Nobel economist, of course. His crude “experiment” was the start of “modern portfolio theory” decades ago. The downside, however, was that with a reduction of risk came a dampening of profits. So scratch that idea.

How about this? A startling study in the late 1970s showed that owning a portfolio of large U.S. companies with international divisions drops your risk 10% below a domestic stock portfolio. Much better. But that wasn’t the eye-popper…

The study also found that owning stocks in international companies cuts your risk in half…

Take that, “efficiency” theorists! Yet the stuffy professors still tried to refute these results. It was a losing battle, though, as more studies emerged, laden with more evidence that international stocks reduce risk.

But the

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Yesterday, Boeing (BA) said it had completed its critical design review of Required Navigation Performance (RNP) procedures for Panama’s Tocumen International Airport and Howard Airport.

The critical design review, which took place at the Copa Airlines training center in Panama City, assessed the "fly-ability" of the procedures to ensure compatibility with airline crew procedures. RNP uses global-positioning satellites and onboard flight-management systems to guide airplanes accurately along precise flight paths.

More precise routing will help in saving flight time and fuel consumption significantly by providing the most direct arrival routes to the runways. It will also help in lowering greenhouse gas emissions.

In May, Boeing signed an agreement with Panama’s Civil Aviation Authority to provide RNP procedures as part of the country’s effort to set new standards for safe and efficient airline operations for its aviation sector.

The current economic crisis remains a real threat to global economic

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