mah_be_mah
Answered against 22 years of US equities and 12 years of US options data and published with the query that produced it. This result is stored as of 2026-10-05, from us-stock-market-hours-tehran-time.
| month | month_label | open_tehran | close_tehran | tehran_lead |
|---|---|---|---|---|
| 2025-09-01 | 2025/09 | 17:00 | 23:30 | 7.5 |
| 2025-10-01 | 2025/10 | 17:00 | 23:30 | 7.5 |
| 2025-11-01 | 2025/11 | 18:00 | 00:30 | 8.5 |
| 2025-12-01 | 2025/12 | 18:00 | 00:30 | 8.5 |
| 2026-01-01 | 2026/01 | 18:00 | 00:30 | 8.5 |
| 2026-02-01 | 2026/02 | 18:00 | 00:30 | 8.5 |
| 2026-03-01 | 2026/03 | 17:00 | 23:30 | 7.5 |
| 2026-04-01 | 2026/04 | 17:00 | 23:30 | 7.5 |
| 2026-05-01 | 2026/05 | 17:00 | 23:30 | 7.5 |
| 2026-06-01 | 2026/06 | 17:00 | 23:30 | 7.5 |
| 2026-07-01 | 2026/07 | 17:00 | 23:30 | 7.5 |
| 2026-08-01 | 2026/08 | 17:00 | 23:30 | 7.5 |
| 2026-09-01 | 2026/09 | 17:00 | 23:30 | 7.5 |
| 2026-10-01 | 2026/10 | 17:00 | 23:30 | 7.5 |
- Rows × columns
- 14 × 5
- Period covered
- to
- Computed
- Completeness
- No missing values
- Source
- US exchange, SIP and OPRA market data
- Licence
- Strasmore terms · free, no signup
What each column holds
| Column | Type | Range | Notes |
|---|---|---|---|
month |
date | 2025-09-01 to 2026-10-01 | |
month_label |
text | 14 distinct values (2025/09, 2025/10, 2025/11…) | |
open_tehran |
text | 2 distinct values (17:00, 18:00) | |
close_tehran |
text | 2 distinct values (00:30, 23:30) | |
tehran_lead |
number | 7.5 to 8.5 |
Computed from Strasmore's warehouse of US exchange, SIP and OPRA market data. Equity prices are delayed; options greeks and implied volatility are end-of-day. This result is stored, not recomputed on load — it is exactly the numbers that were returned on , and the query below is what returned them.
Run it yourself
This is the exact query behind the result above. Change a ticker, a date or a column and run it against the warehouse — no account, no key. The no-signup tier is smaller than the one this page was computed on; a query that reaches past it comes back saying which plan runs it.
SELECT
month,
month_label,
argMax(tehran_open, sessions) AS open_tehran,
argMax(tehran_close, sessions) AS close_tehran,
argMax(tehran_lead, sessions) AS tehran_lead
FROM
(
SELECT
toString(toStartOfMonth(session_date)) AS month,
formatDateTime(toStartOfMonth(session_date), '%Y/%m') AS month_label,
tehran_open,
tehran_close,
tehran_lead,
count() AS sessions
FROM
(
SELECT
toDate(toTimeZone(window_start, 'America/New_York')) AS session_date,
formatDateTime(toTimeZone(min(window_start), 'Asia/Tehran'), '%H:%i') AS tehran_open,
formatDateTime(toTimeZone(max(window_start) + INTERVAL 1 MINUTE, 'Asia/Tehran'), '%H:%i') AS tehran_close,
round((
(toHour(toTimeZone(min(window_start), 'Asia/Tehran')) * 60
+ toMinute(toTimeZone(min(window_start), 'Asia/Tehran')))
- (toHour(toTimeZone(min(window_start), 'America/New_York')) * 60
+ toMinute(toTimeZone(min(window_start), 'America/New_York')))
) / 60, 1) AS tehran_lead
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND window_start >= today() - 400
AND window_start < today() - 2
AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60
+ toMinute(toTimeZone(window_start, 'America/New_York'))) >= 570
AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60
+ toMinute(toTimeZone(window_start, 'America/New_York'))) < 960
GROUP BY session_date
HAVING countDistinct(window_start) = 390
)
GROUP BY month, month_label, tehran_open, tehran_close, tehran_lead
)
GROUP BY month, month_label
ORDER BY month
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