The often derided volume weighted average price (VWAP) was also a central benchmark at over 65 percent.

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Boeing finished Tuesday with a 3.4% gain after announcing a third-quarter target for first delivery of its delayed 787 Dreamliner, helping lift the price-weighted Dow Jones industrial average 51 points to 11, 838.

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Medicare was urged by the labs to cross walk some average price being paid to existing tests to the new codes (perhaps a median or weighted average of the stacks being used, which CMS would be able to measure).

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The price it uses for fuel is a weighted national average for the previous five months, to better reflect market trends, rather than market extremes.

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