Washington (CNN) The Supreme Court on Monday dealt a setback to Freedom of Information Act advocates, ruling that the term "confidential" can be interpreted broadly to allow the government to withhold from disclosure under FOIA private businesses' financial or commercial data in the government's possession, even if the disclosure of that information would not cause any harm to the businesses.

The ruling came in a case concerning food stamps, in which a South Dakota newspaper had sought data from the Department of Agriculture on the number of stores participating in the federal food stamp program, and store-by-store data on the amount of purchases made using food stamps.

Writing for a 6-3 court, Justice Neil Gorsuch sided with a trade association representing grocery retailers, holding that FOIA does not require disclosure of such information so long as the business labels it as "confidential," and provides it to the government under an assurance of privacy.

Gorsuch wrote that "at least where commercial or financial information is both customarily and actually treated as private by its owner and provided to the government under an assurance of privacy, the information is 'confidential'" and fits within the exemption.

"We're disappointed in today's outcome, obviously," said Argus Leader news director Cory Myers . "This is a massive blow to the public's right to know how its tax dollars are being spent, and who is benefiting. Regardless, we will continue to fight for government openness and transparency, as always."

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