https://www.reuters.com/article/us-facebook-results/privacy-concerns-take-toll-on-facebook-as-stock-sinks-on-revenue-miss-idUSKBN1KF2U5 >Facebook Inc on Wednesday reported slower user growth, revenue that fell short of analysts' expectations and increased spending to safeguard data, which cut into its profit margin in the second quarter and sent shares down 7 percent after hours.