However, these times remain the anchor for global finance. The final hour of trading is critical for portfolio managers who must adjust holdings to match benchmark indices, leading to increased volume and price swings known as the "close.
Stock Market Open Close Calendar: Track Regular Trading Hours and Key Times
Major international indices and foreign currency markets often react to the direction set once the US bell rings at 9:30 AM, and the closing gavel at 4:00 PM frequently triggers algorithmic trades and news cycles that echo through Asian and European sessions the following day. The core schedule is fixed year-round, although the clock shifts with daylight saving time changes in March and November.
This schedule ensures consistency and fairness across the electronic trading platforms that facilitate billions of transactions daily. Pre-market trading runs from 4:00 AM to 9:30 AM ET, allowing investors to react to news or earnings released before the open.
Stock Market Open and Close Times for 2025
Standard Trading Hours on US Exchanges The primary US stock markets, including the New York Stock Exchange (NYSE) and the Nasdaq Composite, operate on a standardized schedule established by the Securities and Exchange Commission (SEC). Session Start Time (ET) End Time (ET) Regular Trading 9:30 AM 4:00 PM Pre-Market and After-Hours Trading While the official hours define the core session, trading activity does not completely stop outside of 9:30 AM to 4:00 PM.
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