S&P 500 Gains and Losses Today: Benchmark Index Ticks Lower After Two Days of Record Highs

1. S&P 500 fell 0.1% amid mixed market reactions to new tax bill. 2. Recent tax reforms may boost housing market, impacting builders and related companies. 3. Regulated gaming revenue in Macau surged, benefiting casino operators significantly. 4. Tesla's stock decreased as CEO Musk faced increased scrutiny from President Trump. 5. The Williams Companies saw a significant drop in shares due to executive changes.