UnitedHealth (UNH) is back in the headlines after the Department of Justice launched a civil fraud investigation into the company. The DOJ cites questionable billing practices through diagnoses that trigger extra expenses. As Jenny Horne points out, other stocks in the sector like CVS Health (CVS) fell alongside UNH. She later turns to Block Inc. (XYZ) and its sell-off following its earnings miss and weaker-than-expected guidance.