Wall Street closes higher as Dow, S&P hit one-week tops

Wall Street's main indexes ended higher after fluctuating trading. The Dow and S&P 500 reached one-week highs. Salesforce's stock rose after price target increases from brokerages. Nvidia's shares saw a modest increase following strong earnings. Alphabet's stock declined after the Justice Department's antitrust lawsuit. Jobless claims fell unexpectedly last week.