In a significant market development, US stock indices displayed volatility following the Federal Reserve's decision to implement a jumbo-sized rate cut of 50 basis points. Initially, the Dow Jones Industrial Average soared over 100 points to reach an all-time high, but soon after, broader markets showed mixed results with equities closing slightly lower. Investors appeared to digest the news, showcasing a 'sell the news' reaction as stocks fluctuated. Despite the rate cut being well-received in initial trading, analysts noted that the markets remain rangebound, reflecting cautious optimism amid uncertainty. The Fed's decision marks its first rate cut in four years, with analysts and traders alike now examining the implications for future market performance.