All three major stock indexes are on **four-day winning streaks** : the Dow Jones Industrial Average gained about 0.7% Thursday while the S&P 500 rose about 0.3% and the Nasdaq Composite added 0.2%. All three averages also notched new records, both in the intraday and at the close of the week. The Dow is up 2.7% since Monday, the S&P has gained 2.4% and the Nasdaq is 2.6% higher.