Overnight U.S. equity trading has scaled up markedly in recent months, driven by rising demand from retail participants and improved post-trade capabilities, according to executives at Bruce Markets. Executed volume on the Bruce alternative trading system rose 144% quarter-over-quarter to 1.16 billion shares in the second quarter, with executed notional increasing to $49.03 billion from $23.93 billion, figures provided to Investing.com by Bruce Markets CEO Jason Wallach show.
June was especially active, accounting for nearly half of the quarter's executed volume. The venue's internal data indicate that average nightly volume in June ran at almost three and a half times the first-quarter average.
Bruce's share of total overnight market volume has also expanded. The venue reached a 13.3% share in July, up from just under 11% in June, after increasing from 5.7% in the first quarter to 10.4% in the second.
These patterns appear broadly consistent across the segment. Bruce Markets reports that overnight U.S. equity trading across the three leading ATSs reached 11.14 billion shares and $391.2 billion in notional value in the second quarter, increases of 34% and 59% respectively from the first quarter.
Average nightly share volume across the period climbed steadily month to month, rising from 139.9 million in April to 149.3 million in May and to 248.4 million in June.
Wallach framed the market as having moved past questions of demand. "We are no longer talking about whether there is demand for overnight trading," he said, describing a market already "scaling materially in both share volume and dollars traded." He added that the execution layer is largely in place, with multiple venues, growing liquidity and increasingly sophisticated routing, and that DTCC's move to 24x5 clearing removed a key post-trade constraint.
Bruce identifies retail investors as a principal source of flow overnight, trading large-cap technology names, exchange-traded funds and smaller stocks. Proprietary trading firms and market makers are noted as primary liquidity suppliers, while institutional participation is described as still developing.
Geographic demand is concentrated in Asia, where U.S. regular-session hours fall late at night. The overnight session allows investors in markets such as Japan, South Korea, Singapore and Hong Kong to trade U.S. securities during their own business day. Within the session, activity concentrates at the front end - Bruce's internal figures show the first hour, beginning around 8 p.m. ET, now represents roughly 25% of the venue's market and has exceeded 50% in certain sessions this year.
Despite the advances in execution and clearing, Wallach and Bruce note that several components of the market infrastructure must further mature to treat overnight trading as part of routine institutional workflow. Among the items they identify as needing development are consolidated visibility into liquidity, seamless multi-venue routing, strengthened risk controls and surveillance, improved corporate-action handling, and operating models capable of reliably supporting the extended session.
"A trading workflow designed around the regular session cannot simply be stretched across another eight hours and assumed to work the same way," he said. "That is where developments like ABN AMRO Clearing supporting access to Bruce matter. Overnight trading becomes much easier to treat as part of the normal institutional trading lifecycle when established clearing, data, routing and technology providers support it." The comments follow ABN AMRO Clearing USA expanding its 24x5 U.S. equities offering to support client access to Bruce ATS.
For the market to progress beyond its current phase, Wallach said broader participation will be required - including more brokers offering multi-venue access, additional liquidity providers competing across venues, and institutional firms equipped to trade overnight without treating it as a separate technology project. He indicated that this will be a multi-year process rather than a single tipping point.
The question of whether overnight trading encroaches on the closing auction's role as a reference price was raised. Wallach drew a distinction between the close as an official benchmark and as the market's last informational reference point, arguing that post-close information flow naturally extends price discovery when sufficient liquidity exists. "Information continues to arrive after 4 p.m., and if there is sufficient liquidity for investors to react to earnings, economic news or geopolitical events, price discovery naturally continues with it. That is already happening today," he concluded.
Summary
Overnight U.S. equity trading has accelerated in the first half of the year. Bruce Markets reported a 144% quarter-over-quarter increase in executed shares on its ATS to 1.16 billion in Q2 and a rise in executed notional to $49.03 billion from $23.93 billion. Across the three leading ATSs, overnight trading reached 11.14 billion shares and $391.2 billion in notional in Q2, up 34% and 59% from Q1. While execution venues and clearing have advanced, the industry still needs consolidated liquidity visibility, multi-venue routing, risk controls, surveillance, corporate-action handling and operational models to reliably integrate overnight trading into standard institutional workflows.
Key points
- Bruce ATS executed volume jumped 144% quarter-over-quarter to 1.16 billion shares in Q2; executed notional rose to $49.03 billion from $23.93 billion.
- Industry-wide overnight trading on the three leading ATSs reached 11.14 billion shares and $391.2 billion in notional in Q2, increases of 34% and 59% from Q1; average nightly volume rose from 139.9 million in April to 248.4 million in June.
- Execution and clearing capabilities, including DTCC's move to 24x5 clearing and ABN AMRO Clearing USA's expansion, have removed some constraints - but consolidated visibility, routing, surveillance and operating models require further development.
Risks and uncertainties
- Consolidated liquidity visibility remains limited, which could complicate best execution and routing decisions for brokers and institutions - impacting broker-dealers and electronic liquidity providers.
- Multi-venue routing, risk controls and surveillance frameworks are still maturing, creating operational and compliance risks for firms attempting to integrate overnight trading into standard workflows - affecting compliance, trading operations and market surveillance teams.
- Corporate-action handling and broader operational support for an extended session are not yet fully developed, posing processing and settlement risks for custodians, clearing firms and institutional managers.