CBOE's 22-Hour Trading Plan: The Real Impact

CBOE Global Markets is pushing to extend U.S. equity and options trading to 22 hours a day, five days a week. The proposal, still under regulatory discussion, would mark the biggest shift in market hours since the introduction of electronic trading.

The simple read is straightforward. More trading hours mean more transaction volume. CBOE's revenue model depends on fees from each trade and from market data subscriptions. A 22-hour session would expand the addressable trading window by roughly 60% compared with the current 8:30 a.m. to 4:00 p.m. ET core session. The exchange would capture a larger share of global order flow, especially from Asia and Europe during their business hours.

The better market read is more complicated. Extended hours introduce structural risks that could offset the volume gains. Overnight liquidity is thin by definition. A handful of market makers would need to quote prices across 22 hours, raising their capital and staffing costs. If those costs are passed back to traders through wider spreads, the net benefit of longer hours shrinks. Technical glitches during off-hours, when exchange support teams are thinner, could erode confidence faster than a daytime outage would.

CBOE is not alone in exploring this shift. Nasdaq and Intercontinental Exchange are watching closely. If they follow suit, any first-mover advantage for CBOE would be short-lived. The competitive response could compress fee margins across the industry.

The proposal is under discussion with regulators and market participants, people familiar with the matter said. A pilot program could launch later this year if approved. The SEC's response to CBOE's filing will determine the timeline. No decision date has been set.

CBOE carries an Alpha Score of 64 out of 100, labeled Moderate. That rating captures the balanced risk-reward: the upside from volume growth against the execution and competitive risks. For a deeper look at the exchange's fundamentals, see the CBOE stock page.