MarketCalendars.com

B3 vs BYMA trading hours

B3 and BYMA next both trade from 14:00 to 20:00 UTC on Wednesday 28 October 2026 (6h 0m)

Markets

São Paulo · Stocks

ClosedOpens in 50m 27s

Buenos Aires · Stocks

ClosedOpens in 1h 50m

On one 24-hour axis

Now2 days ago

UTC

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

Both open

TradingBreakPre-market and after-hoursOverlapNow

Upcoming overlaps

Overlap	Length
Wed 28 Oct, 14:00–20:00 UTC	6h 0m
Thu 29 Oct, 14:00–20:00 UTC	6h 0m
Fri 30 Oct, 14:00–20:00 UTC	6h 0m
Tue 3 Nov, 14:00–20:00 UTC	6h 0m
Wed 4 Nov, 14:00–20:00 UTC	6h 0m

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

Upcoming BYMA holidays

Mon 23 Nov 2026Day of National SovereigntyMarket holiday
Tue 8 Dec 2026Immaculate ConceptionMarket holiday
Thu 24 Dec 2026Christmas EveEarly close
Fri 25 Dec 2026Christmas DayMarket holiday
Thu 31 Dec 2026New Year's EveEarly close

Frequently asked questions

When do B3 and BYMA trading hours overlap?

B3 and BYMA next both trade from 14:00 to 20:00 UTC on Wednesday 28 October 2026 (6h 0m).

What time does B3 open compared to BYMA?

B3 trades 10:00 to 18:00 local time (America/Sao_Paulo); BYMA trades 11:00 to 17:00 local time (America/Argentina/Buenos_Aires).

Popular comparisons

See also B3 hours and BYMA hours