CHART OF THE DAY: Mac Sales Spike When A New Version Of Windows Comes Out

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Microsoft’s upcoming Windows 7 launch could be very good news for Apple, Fortune blog Apple 2.0 reports.

Ever since Windows 98 came out in June 1998, every time Microsoft (MSFT) has launched a new version of its operating system, Apple’s computer sales spike during the same quarter.

Broadpoint AmTech analyst Brian Marshall, who noticed the trend, observed:

“We have concluded that no negative correlation exists on Apple’s (AAPL) hardware sales when Microsoft launches a new OS. Ironically, we believe new OS launches from Microsoft (MSFT) may have even acted as a ‘delayed accelerant‘ to AAPL’s computing sales.”

Reminding us that correlation does not equal causation, Brian notes, “Apple’s success (or failure) in the computing market is largely idiosyncratic (or company-specific) in nature and not dependent on others in the industry.”

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