Major retailers can tailor prices based on customer data including location, demographics or shopping history, the US Federal Trade Commission said in initial study findings, raising concerns about the use of what they termed “surveillance pricing.

The Federal Trade Commission has taken action against General Motors and OnStar for allegedly sharing details about drivers to third parties without their consent.

General Motors reached an agreement to settle allegations that the automaker shared drivers’ locations and behavior data without their consent, the Federal Trade Commission said.