Weekly Indices Update | US Markets: S&P 500 | Nasdaq | Dow JonesS&P 500SP:SPXEarnTrainingThe S&P 500 remains the broadest measure of US equity market health, tracking 500 of the largest publicly listed companies. When it moves, it tends to reflect broader investor sentiment across sectors. The Nasdaq is more sensitive to tech and growth stocks. It reacts faster to interest rate expectations and risk appetite shifts — making it a useful barometer for how confident the market feels about the future. The Dow Jones, while older and narrower in scope, still carries weight as a benchmark. Watch it alongside the S&P for confirmation of broader trend direction rather than relying on it alone. What to watch: Federal Reserve tone, inflation data releases, and any major earnings reports from large-cap tech names.[/i] Indices don't move in isolation. What happens in US markets on a Friday often sets the tone for Asian markets on Monday morning, which then feeds into European sentiment by mid-week. Understanding these connections — how global markets influence each other — is a fundamental part of reading market conditions with clarity. You don't need to track every index every day. But having a working knowledge of what each one represents and what drives it gives you a much stronger foundation for understanding why markets move the way they do.