Stock market today: Dow, S&P 500, Nasdaq futures edge lower with rate-cut bets, Walmart earnings in focus

Market Overview - US stock futures retreated as fears of US-Iran conflict fueled a jump in oil prices, with S&P 500 and Nasdaq 100 futures falling about 0.3% [1] - Oil prices saw their biggest daily jump since October, with Brent crude rising above $71 per barrel and West Texas Intermediate near $66 [2] - Investors are analyzing the Federal Reserve's minutes from January's policy meeting, which indicated divisions over future rate hikes amid persistent inflation [3] Company Earnings - Walmart is set to report earnings, acting as a bellwether for the retail sector [4] - DoorDash reported fourth-quarter results that slightly missed Wall Street expectations, with earnings per share at $0.48 compared to the forecast of $0.55, but adjusted EBITDA rose 38% year over year to $780 million [7][8] - DoorDash's revenue grew 28% year over year to $3.96 billion, slightly below the nearly $4 billion expected, while total orders increased 32% to 903 million [8][9] - For Q1 2026, DoorDash expects marketplace GOV to be between $31.0 billion and $31.8 billion, exceeding the Street's forecast of $30.75 billion [10] Industry Developments - Samsung Electronics' stock surged to a record high as it negotiates a price for its latest AI memory chip, HBM4, which is expected to be priced around $700 per unit, up to 30% higher than the previous generation [4][5] - Samsung has started mass production of HBM4 chips and has shipped commercial products to customers, marking a comeback in the AI chip market [6]