Nasdaq plans to launch 23-hour trading on Dec. 6, while NYSE Arca is pursuing a 22-hour model and Cboe is awaiting SEC approval.
The SEC is moving ahead with discussions on near round-the-clock trading in the U.S. stock market, scheduling a Sept. 17 roundtable to examine the infrastructure required and the risks involved. The initiative comes as major exchanges prepare longer trading windows by year-end. Nasdaq plans to formally begin 23-hour trading on Dec. 6, NYSE Arca is advancing a 22-hour proposal, and Cboe is still waiting for SEC approval. The push reflects growing interest in extending market access beyond the traditional session, though regulators are focusing on operational resilience and market-risk implications before broader implementation.