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Tracking your card purchases: Big data becoming big business

Kelly Dilworth

If sharing information about what you buy with strangers makes you squeamish, then you may want to think twice about swiping your credit card.

Everyone from the IRS to your neighborhood burger joint wants to know what you charge to your card. And, increasingly, new tools and services — courtesy of credit card issuers and other businesses — are allowing them to sneak a peek.

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