Australian Securities Exchange (ASX) Trading Hours

The Australian Securities Exchange (ASX) is the primary financial market in the Pacific region, headquartered in Sydney. It is a vertically integrated exchange, meaning it handles listings, trading, clearing, and settlement under one roof. Reflecting the Australian economy, the ASX is heavily weighted towards "The Big Four" banks (CBA, Westpac, NAB, ANZ) and massive resource companies like BHP and Rio Tinto. The S&P/ASX 200 is the standard benchmark index. **Trading Nuances:** The ASX operates a unique **Pre-Open Phase** from 7:00 AM to 10:00 AM. During this time, brokers enter orders, but no trades execute. This allows an "equilibrium price" to form before the market officially opens at 10:00 AM. The market closes at 4:00 PM with a "Closing Single Price Auction" (CSPA), a randomized period between 4:00 PM and 4:10 PM where closing prices are determined.