As of October 19, 2026, Cboe has launched extended trading sessions for select single-stock and exchange-traded fund (ETF) options. This new arrangement allows investors to manage their options positions outside of standard U.S. market hours. But what does this change signify for market structure, and how does it affect liquidity dynamics?

Extended sessions and scope

Under the new framework, the pre-market session for selected single-stock and ETF options runs from 7:30 a.m. to 9:25 a.m. ET, while the post-market session takes place between 4:00 p.m. and 4:15 p.m. ET. The scope includes 25 highly liquid stocks—such as Nvidia and Bank of America—and 5 ETFs, including the SPDR S&P 500 ETF Trust (SPY) and the iShares Russell 2000 ETF. Cboe plans to update this list twice a year, with the intention of expanding the scope over time.

Liquidity and market impact

The most critical aspect of extended hours is the quality of liquidity during these sessions. Cboe officials acknowledge that bid-ask spreads may be wider during pre- and post-market sessions compared to regular trading hours. Data from the first day shows that 16,000 options contracts were traded during these new sessions—a figure that, when compared to the daily market volume of 71 million contracts, indicates the initiative is still in its early stages. This suggests that liquidity will likely need time to stabilize. Meanwhile, it is noted that in the first quarter of 2026, option volumes during these time slots increased by 32% compared to the previous year, a rise driven by demand from the Asia-Pacific region.

A shift in global market structure

Cboe’s move is part of a broader trend toward extending trading hours in global markets. During the same period, the NYSE also announced plans to offer extended option trading hours for 29 major stocks and funds, with intentions to transition to 23-hour, five-day-a-week trading sessions for equities starting in December 2026. These developments aim to enable investors to react more quickly to market movements across different geographical regions and to manage risk with greater flexibility.

Assessment

Cboe’s extended option sessions represent a concrete step toward the modernization of market infrastructure. While uncertainties regarding liquidity and spread depth may persist in the initial phase, the impact of such structural changes typically becomes apparent in the medium term. For investors, the key consideration when trading during these extended hours is to account for the unique liquidity conditions and potential price volatility inherent to these sessions. In the coming period, data on trading volumes and spreads during these sessions will reveal the extent to which this change has been adopted.

This article does not constitute investment advice.
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