1. The S&P 500 index ended lower for the holiday-shortened week as Wall Street's bull run lost some steam. 2. The S&P 500 posted a massive advance of +23.31% for the year, marking the first time since 1998 that it delivered back-to-back annual gains of more than 20%. 3. Tesla garnered attention with a Cybertruck explosion and its first annual fall in deliveries. 4. The S&P 500 slipped -0.5% for the week, while the Dow and Nasdaq also fell slightly.