Stocks fluctuated to begin the week as a hearing on Russia's involvement in the U.S. election continued on Capitol Hill. FBI Director Comey confirmed that the agency was investigating Russia's actions, including possible collusion with the Trump campaign. Nike ( NKE) gave the Dow Jones Industrial Average a boost ahead of quarterly earnings scheduled for Tuesday. Analysts anticipate adjusted earnings of 53 cents a share for its February-ended quarter, two cents less than a year earlier. Deutsche Bank ( DB) fell after announcing plans to issue shares to raise 8 billion euros. The bank also said it had cut staff bonuses by 80% last year following its second straight full-year loss. Snap ( SNAP) rose after receiving its first BUY rating from an analyst firm. Monness, Crespi, Hardt initiated with a BUY and $25 price target. The disappearing message app so far has received six SELL ratings and three HOLD ratings from Wall Street firms.