A data breach affecting 57 million customers and drivers should not have been concealed, the information commissioner says.Read more
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New York business reporter
Shares in US credit rating firm Equifax fell on Friday, after executives said they expect the massive data breach the firm disclosed in September to continue to weigh on the business.
The credit bureau expects revenue growth to be 3%-4% lower and costs to exceed $60m (£45.7m) in the fourth quarter.
It already incurred $87.5m in expenses in the third quarter, pushing profits down 27%.
The firm disclosed the forecast on Friday, as executives discussed the firm's first earnings report since the data breach was revealed.
Equifax estimates that more than 145 million people in the US, UK and Canada may have been affected.
Computer viruses that threaten to delete your files unless you pay a ransom are known as ransomware.