Need to know why a stock just tanked or rallied 15% in a day? This server surfaces the actual reasons behind major price movements across S&P 500 and NASDAQ stocks. It pulls in earnings reports, breaking news, analyst upgrades and downgrades, and sector-wide catalysts so you can skip the guesswork. Reach for it when you're building trading dashboards, portfolio monitoring tools, or market research applications that need to explain volatility in plain language. The HTTP transport makes it straightforward to integrate into existing financial applications or LLM-powered analysis workflows where understanding market causality matters more than just tracking prices.