By Fit You Trade US Stocks 24 Hours a Day?
You fit trade US stocks almost 24 hours on weekdays. See the four windows, when the tape prints, and how wide spreads fit get overnight.
You fit trade US stocks for almost 24 hours every weekday, but e no be one continuous market. Four separate windows dey follow one another: pre-market session, regular session, after-hours session, and overnight session wey dey run while New York dey sleep. Each window get im own venues, im own list of eligible tickers, im own order-type rules, and im own liquidity. Na only one of dem dey produce the official closing price.
US trading day get four windows
All the time wey dey below na New York time, na the clock wey every US venue dey use publish.
- Pre-market dey run from 4:00 a.m. reach 9:30 a.m.
- Regular session dey run from 9:30 a.m. reach 4:00 p.m. Na only this window get opening auction and closing auction for the listing exchange.
- After-hours dey run from 4:00 p.m. reach 8:00 p.m.
- Overnight cover from 8:00 p.m. reach 4:00 a.m. the next morning, from Sunday evening reach Friday morning.
The first three don dey for decades, and na wetin most brokers mean when dem talk extended hours. Our after-hours and pre-market trading guide explain those two periods well. This page na for the fourth window.
Overnight orders no dey reach the regular books for New York Stock Exchange or Nasdaq. Dem dey route go venues wey dem build for that window. Blue Ocean ATS don dey run overnight book for US equities for several years, and e dey report its executions to a FINRA trade reporting facility. 24X National Exchange get SEC approval for late 2024 to operate an almost round-the-clock exchange. The big listing exchanges too don publish their own plans for longer weekday sessions.
Two limits dey come from this structure. Every venue dey publish eligibility list, and the list dey favor big US stocks and exchange traded funds. Every broker still add another, narrower list on top. So, stock wey you fit trade by 2:00 a.m. through one broker fit no dey available at that time through another broker. And no venue dey run literal 24 hours. Overnight books dey pause for maintenance break every evening, and everything dey stop from Friday evening until Sunday evening.
US tape dey print for which hours exactly?
The consolidated tape na the official record of US trades, but e no cover 24 hours. Below na every New York clock hour wey get at least one share print for five of the market’s names wey people trade pass, during the week of July 13 to July 17, 2026.
The exact SQL behind every number
WITH (
SELECT sum(volume)
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker IN ('AAPL', 'MSFT', 'NVDA', 'SPY', 'TSLA')
AND window_start >= toDateTime('2026-07-13 08:00:00', 'UTC')
AND window_start < toDateTime('2026-07-18 00:00:00', 'UTC')
) AS week_shares
SELECT formatDateTime(toTimeZone(window_start, 'America/New_York'), '%H:00') AS et_hour,
round(toFloat64(sum(volume)) / 1000000, 1) AS volume_millions,
round(100 * toFloat64(sum(volume)) / toFloat64(week_shares), 2) AS pct_of_week
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker IN ('AAPL', 'MSFT', 'NVDA', 'SPY', 'TSLA')
AND window_start >= toDateTime('2026-07-13 08:00:00', 'UTC')
AND window_start < toDateTime('2026-07-18 00:00:00', 'UTC')
GROUP BY et_hour
ORDER BY et_hourPrints show for 16 out of the 24 hours on the clock. The earliest one na 04:00 hour, while the latest one na 19:00 hour. The tape run continuously between those two hours. Outside that window, these five names no print anything.
The pattern matter just as the coverage matter. 04:00 hour carry 7.4 million shares, wey be 0.59% of the total for the week across the five names. 19:00 hour carry 0.18%. The chart look like tower, with almost flat floor for both sides.
The missing hours na the overnight window. Their absence na reporting mechanic, e no mean say nobody exchange shares. Overnight executions dey report to a FINRA trade reporting facility, but the facility dey closed for those hours. The reports go out when e open the next morning, and dem carry the next business day’s trade date. Overnight print no dey enter any hour bucket of its own.
How thin trading dey outside regular session?
Volume na the clearest way to measure am. Seven popular stocks for the same week, split by the time wey each share trade.
SPY do most of its weekly trading outside regular session: 2.64% of its shares trade before the 9:30 a.m. open, and 10.6% after the 4:00 p.m. close. The regular six and a half hours still carry 86.76%. For the other end of the list, KO put 96.68% of its weekly trading inside regular session alone.
One day, shown in half-hour intervals, tell the same story clearly. Na NVDA on Tuesday, July 14, 2026, from the first pre-market print reach the last after-hours print.
The exact SQL behind every number
SELECT formatDateTime(toStartOfInterval(toTimeZone(window_start, 'America/New_York'), INTERVAL 30 MINUTE), '%H:%i') AS et_time,
round(argMax(close, window_start), 2) AS price,
round(toFloat64(sum(volume)) / 1000, 0) AS volume_thousands
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'NVDA'
AND window_start >= toDateTime('2026-07-14 08:00:00', 'UTC')
AND window_start < toDateTime('2026-07-15 00:00:00', 'UTC')
GROUP BY et_time
ORDER BY et_timeThe first bucket, 04:00, print 408 thousand shares and close at $205.3. The last one, 19:30, print 118 thousand and close at $211.8. All 32 buckets for the day dey for the chart, and the volume bars no rise from the axis until regular session open.
Bid ask spread dey widen outside regular hours?
Bid ask spread na gap between the highest price wey buyer publicly ready to pay and the lowest price wey seller go accept. Na the cost of trading immediately. Below na AAPL quoted spread on Tuesday, July 14, 2026, sampled at seven points for the clock. Each reading na the average spread inside one minute, then the median minute for that hour, measured in basis points. One basis point na one hundredth of one percentage point.
The exact SQL behind every number
WITH per_minute AS (
SELECT toStartOfMinute(toTimeZone(sip_timestamp, 'America/New_York')) AS et_minute,
avg((toFloat64(ask_price) - toFloat64(bid_price))
/ ((toFloat64(ask_price) + toFloat64(bid_price)) / 2)) * 10000 AS avg_spread_bps
FROM global_markets.cache_stocks_quotes
WHERE ticker = 'AAPL'
AND sip_timestamp >= toDateTime('2026-07-14 08:00:00', 'UTC')
AND sip_timestamp < toDateTime('2026-07-15 00:00:00', 'UTC')
AND bid_price > 0
AND ask_price > bid_price
AND toHour(toTimeZone(sip_timestamp, 'America/New_York')) IN (4, 8, 10, 12, 14, 16, 18)
GROUP BY et_minute
)
SELECT formatDateTime(et_minute, '%H:00') AS et_hour,
count() AS quoted_minute_count,
round(quantileDeterministic(0.5)(avg_spread_bps, cityHash64(et_minute)), 2) AS median_spread_bps,
round(quantileDeterministic(0.9)(avg_spread_bps, cityHash64(et_minute)), 2) AS p90_spread_bps
FROM per_minute
GROUP BY et_hour
HAVING count() >= 5
ORDER BY median_spread_bps DESCThe widest hour for the sample na 18:00. For that hour, the median minute quote 10.25 basis points, while the widest tenth of minutes quote 13.98. The tightest one na 14:00 at 0.85. Dem arrange the rows from widest to tightest. If you read the order from top to bottom, the lesson clear by itself: na the same stock, for the same day, but the cost to trade am fit change depending on the hour wey you reach am.
Bid ask spreads explain the number itself, while why spreads dey widen for market open explain the mirror image at 9:30 a.m. Wide quotes na one of the conditions wey fit happen when stock open far from where e close, and overnight gaps discuss that one separately.
Wetin 24-hour trading no mean
- No be every ticker. Each venue dey set im own eligibility list. Broker fit narrow am again, and the list fit change.
- No be every order type. Overnight books normally dey accept limit orders only. For most brokers, market orders and stop orders no dey available for that window.
- No be official price. The closing price of record dey set for the listing exchange closing auction at 4:00 p.m. Index levels and fund valuations dey set from that print, and overnight execution no dey move am.
- No be options. US listed equity options get their own shorter session. Small number of index option products dey trade into overnight hours. Single stock options no dey.
- No be full 24 hours. Maintenance pause dey every evening. The whole system dey offline from Friday evening reach Sunday evening.
US market hours from Tokyo, Hong Kong and Sydney
Readers wey their workday dey overlap with US night dey ask this question pass. New York na the main reference point. From the second Sunday for March reach the first Sunday for November, New York dey use daylight time, four hours behind UTC.
- Tokyo, 13 hours ahead: regular US session dey run from 10:30 p.m. reach 5:00 a.m. the next morning. Overnight session dey run from 9:00 a.m. reach 5:00 p.m., wey be normal Tokyo workday.
- Hong Kong and Singapore, 12 hours ahead: regular session na 9:30 p.m. reach 4:00 a.m. Overnight session na 8:00 a.m. reach 4:00 p.m.
- Sydney, 14 hours ahead for July: regular session na 11:30 p.m. reach 6:00 a.m. Overnight session na 10:00 a.m. reach 6:00 p.m.
Both hemispheres dey change their clocks, but dem no dey do am for the same dates. Check the current offset again for November and March. US stock market hours worldwide get the fuller list of local equivalents. US stock market hours cover the standard calendar, while market holidays and early closes cover the days wey that calendar dey bend.
FAQ
You fit trade US stocks 24 hours every day?
E near am weekdays, across four different windows instead of one market. Pre-market dey run from 4:00 a.m. to 9:30 a.m. New York time. Regular session dey run from 9:30 a.m. to 4:00 p.m. After-hours dey run from 4:00 p.m. to 8:00 p.m. Overnight session dey cover 8:00 p.m. to 4:00 a.m. for eligible tickers and venues wey support am. Nothing dey trade between Friday evening and Sunday evening.
Overnight trading dey set closing price?
No. Listing exchange closing auction dey set the official closing price for 4:00 p.m. New York time. Overnight executions dey report to FINRA facility and dem carry the next business day's trade date. Na why dem no dey show for overnight hour for the tape.
Which stocks fit trade overnight?
Each overnight venue dey publish its own eligibility list. The list dey usually favor big US stocks and exchange traded funds. Each broker still dey apply another, narrower list. Two accounts fit differ on whether the same ticker dey available for the same minute.
How much wider spreads dey outside regular hours?
For AAPL on July 14, 2026, the widest hour among the seven wey dem sample na 18:00. For that hour, the median minute quote 10.25 basis points, compared with 0.85 for the tightest hour, 14:00. Thin windows dey quote wider spreads. One order fit move the quoted price more than that same order for midday.
Options dey trade overnight?
US listed equity options get their own session, and e shorter than the equity day. Small number of index option products dey trade into overnight hours. Single stock options no dey form part of the overnight equity session.
Every hour bucket and spread reading wey dey above come from stored query. Open the SQL under any panel and run am yourself for the Strasmore terminal.