What are E-Mini Futures?

The article explains how E-mini futures, especially the E-mini S&P 500, are used to trade or hedge market moves before the stock market opens. It highlights that recent geopolitical headlines caused sharp overnight repricing in S&P 500 futures, underscoring their role as the first venue where equity sentiment shows up. The piece details contract sizing, leverage, margin requirements, and why micro contracts were introduced for smaller traders. It also notes the nearly 24-hour trading window, daily mark-to-market settlement, CFTC regulation, and the elevated risks from leverage. Market impact-wise, the article frames S&P 500 futures as a key indicator of near-term U.S. equity volatility, especially around events like the June 17 Fed decision and Juneteenth-related market closure.