Stock market today: S&P 500, Dow, Nasdaq wobble after CPI inflation cools more than expected

Market Overview - US stocks experienced volatility, with the Dow Jones Industrial Average and Nasdaq Composite drifting below the flatline, while the S&P 500 fluctuated between small gains and losses, indicating a potential for weekly losses as Wall Street reacted to inflation data [1] Inflation Data - The Consumer Price Index (CPI) indicated that consumer prices rose by 0.2% in January compared to the previous month and increased by 2.4% year-over-year, suggesting a cooling inflation trend [2] Federal Reserve Expectations - The inflation report is expected to influence Federal Reserve policy, with traders increasing bets on a potential quarter-point interest rate cut in June, while a majority still anticipates two cuts by the end of 2026 [3] Sector Performance - Caution in the market followed significant selling pressure, particularly in technology stocks, as concerns about AI disruption affected traditional sectors like real estate, logistics, and transportation [4] Company Earnings - Applied Materials (AMAT) saw its stock surge over 13% due to a positive outlook driven by strong AI demand, while Pinterest (PINS) shares fell approximately 25% as revenue missed expectations and analysts expressed concerns about AI risks [5] - Rivian (RIVN) shares increased by more than 25% following a strong fourth-quarter earnings report, with the company announcing that its R2 midsize model is on track for delivery before summer [6] - Moderna (MRNA) shares rose about 6% after its earnings report, recovering from a 10% drop earlier in the week following the FDA's rejection of a new flu vaccine [6]