S&P 500, Nasdaq Mark Four-Week Streaks With Record Highs. Earnings Next Week Will Test the Rally.

The S&P 500 and Nasdaq capped off their fourth-straight week of gains with record closes. The S&P rose 0.8%. The Nasdaq gained 1.6%. Both topped their prior closing highs from earlier in the week. The Dow fell 85 points, or 0.