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This excerpt taken from the DVN 10-K filed Feb 28, 2007. Changes
in Short-Term Investments
To maximize our income on available cash balances, we invest in
highly liquid, short-term investments. The purchase and sale of
these short-term investments will cause cash and cash
equivalents to decrease and
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increase, respectively. Short-term investment balances decreased
$106 million and $287 million in 2006 and 2005,
respectively, and increased $626 million in 2004.
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