Cboe pushes single-stock options past the close: 130 extra minutes a day, and a new risk boundary

Cboe is running weekend system tests ahead of extended pre-market and post-market sessions for single-stock equity options, after the SEC approved its rule filing on May 28, 2026, with a production launch currently targeted for July 13, 2026 ^[1][2][3]. This is a plumbing change, but it moves the edges of the trading day, and the edges of the trading day are where risk desks draw their lines.

The windows are 7:30 AM to 9:25 AM ET before the regular open and 4:00 PM to 4:15 PM ET after the close, Monday through Friday ^[4]. That is 115 minutes at the front and 15 at the back ^[1][2], so 130 additional minutes per day, or 10 hours and 50 minutes across a five-day week ^[3]. The asymmetry is the part worth sitting with: the morning window is roughly eight times the length of the evening one ^[4], which makes the afternoon session less a session than a handoff.

Initial coverage is about 20 of the most liquid US names, including the full Magnificent 7 roster with AAPL, NVDA, TSLA, AMZN and AVGO, plus AMD, BAC and BABA ^[7][8]. Cboe is not starting cold. Its Global Trading Hours platform already runs SPX and VIX options from 8:15 PM to 9:25 AM ET ^[9], and in Q1 2026 GTH and curb volumes hit records, up 32% year over year, with a meaningful share of that growth coming from Asia-Pacific investors who want US risk management tools inside their own business hours, according to the source material ^[10][11]. The new single-stock morning window ends at the same 9:25 AM cutoff as GTH ^[5], so the handoff into the regular session is at least uniform across products.

For anyone running a book, the practical effect is that marks, hedge execution and any collateral conversation that follows from them no longer stop at 4:00 PM ^[4]. Fifteen minutes is short, but it is fifteen minutes in which a listed single-stock option can move while the instruments a desk would normally use to neutralise it may be thinner. The same applies in reverse at 7:30 AM, nearly two hours before the regular open ^[4][1]. And the overnight gap does not disappear; it moves. These names still go untraded on Cboe from 4:15 PM to 7:30 AM, a stretch of 15 hours and 15 minutes ^[6].

The test calendar is a tell about sequencing. Customer test dates are May 30, June 27, July 11 and August 15, 2026 ^[6]. The first landed two days after SEC approval ^[7], and the last falls more than a month after the July 13 target ^[8], which suggests onboarding is expected to continue after go-live rather than conclude at it.

Three things to watch. Whether July 13 holds, since the source notes the date remains subject to regulatory review ^[3]. Whether market-making quoting obligations and permitted spread widths in the new windows are set at regular-session levels or looser, which the material does not address and which determines whether the extra 130 minutes are tradable or merely open ^[3]. And whether the symbol list moves beyond the initial 20, because the risk case for extended hours is weakest in exactly the names that are not already deeply liquid ^[7].