Stock market today: Dow, S&P 500, Nasdaq sink after hot PPI inflation print, indexes on track for monthly losses

Group 1: Market Overview - US stocks experienced a significant decline, with the Dow Jones Industrial Average falling 1.4%, nearly 700 points, while the Nasdaq Composite and S&P 500 dropped 0.9% and 0.6% respectively [1] - Major indexes are on track to post monthly losses in February, with the Dow set to end its eight-month winning streak [2] Group 2: Company-Specific News - Block announced it will cut nearly half of its workforce and overhaul operations due to the impact of AI on its business model, which has raised concerns about AI disrupting various service industries [2] - Jack Dorsey, co-founder of Block, anticipates that many companies will make similar structural changes in the next year, leading to a 20% increase in Block's shares during premarket trading [3] - Netflix shares rose after the company abandoned its pursuit of Warner Bros. Discovery, allowing Paramount Skydance to acquire the studio, which also boosted its stock [4] Group 3: Economic Indicators - The producer price index (PPI) for January increased by 0.5% month over month, surpassing the expected 0.3% rise, while the core PPI, excluding food and energy, rose by 0.8%, also exceeding forecasts [5]