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COMEX vs B3 trading hours

COMEX and B3 next both trade from 13:00 to 21:00 UTC on Wednesday 28 October 2026 (8h 0m)

Markets

New York · Futures

ClosedOpens in 29m 11s

17:00^{−1 previous day}–16:00

São Paulo · Stocks

ClosedOpens in 15h 29m

On one 24-hour axis

NowToday

UTC

00:0003:0006:0009:0012:0015:0018:0021:00

Both open

TradingBreakPre-market and after-hoursOverlapNow

Upcoming overlaps

Overlap	Length
Wed 28 Oct, 13:00–21:00 UTC	8h 0m
Thu 29 Oct, 13:00–21:00 UTC	8h 0m
Fri 30 Oct, 13:00–21:00 UTC	8h 0m
Tue 3 Nov, 13:00–21:00 UTC	8h 0m

Upcoming COMEX holidays

Thu 26 Nov 2026Thanksgiving DayEarly close
Fri 27 Nov 2026Day after Thanksgiving DayEarly close
Thu 24 Dec 2026Christmas EveEarly close
Fri 25 Dec 2026Christmas DayMarket holiday
Fri 1 Jan 2027New Year's DayMarket holiday

Upcoming B3 holidays

Mon 2 Nov 2026All Souls' DayMarket holiday
Fri 20 Nov 2026Black Consciousness DayMarket holiday
Thu 24 Dec 2026Christmas EveMarket holiday
Fri 25 Dec 2026Christmas DayMarket holiday
Thu 31 Dec 2026New Year's DayMarket holiday

Frequently asked questions

When do COMEX and B3 trading hours overlap?

COMEX and B3 next both trade from 13:00 to 21:00 UTC on Wednesday 28 October 2026 (8h 0m).

What time does COMEX open compared to B3?

COMEX trades 17:00 to 16:00 local time (America/Chicago); B3 trades 10:00 to 18:00 local time (America/Sao_Paulo).

Popular comparisons

See also COMEX hours and B3 hours