https://techcrunch.com/2017/09/08/equifax-stock-tumbles-14-after-credit-score-hack/ >Credit score business Equifax revealed Thursday that 143 million people were compromised in a cyber attack. Social security numbers and other personally identifying information were accessed. >And guess what, the stock market didn’t like it! The company lost about $2 billion in market cap Friday after tumbling nearly 14%.