 Traders are looking ahead to several earnings reports this week, including updates from Delta Airlines on Thursday and J.P. Morgan's Citigroup in Wells Fargo on Friday. Federal Reserve Chair Jerome Powell addresses Congress on Tuesday and Wednesday. Treasury yields were stable in the bond market. Seth Suttel, New York. The Surgeon General has said there's a loneliness epidemic in America, and for many people, that includes a lack of friendships at work.