Big Tech Climb Powers S&P 500, Nasdaq to New Records - WSJ
1. Apple, Nvidia, Tesla boosted S&P 500 and Nasdaq to record highs. 2. Job losses in private sector may indicate economic slowdown ahead. 3. AI-driven tech sector gains remain a long-term trend. 4. Strong performance in big tech amid concerns of tariff disruptions. 5. Market reactions are mixed despite falling vehicle sales for Tesla.