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Average distance from each ET clock mark to the closing print (SPY, trailing months)

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 2026-11-07, from Mutual Fund Forward Pricing Rule Explained.

as of series 13×3read in context →
Average distance from each ET clock mark to the closing print (SPY, trailing months) — 13 rows by 3 columns, computed from US exchange, SIP and OPRA data.
et_timeavg_move_to_close_pctobservations
09:300.414105
10:000.388105
10:300.345105
11:000.324105
11:300.318105
12:000.274105
12:300.233105
13:000.211105
13:300.181105
14:000.169105
14:300.15105
15:000.14105
15:300.108105
Rows × columns
13 × 3
Computed
Completeness
No missing values
Source
US exchange, SIP and OPRA market data
Licence
Strasmore terms · free, no signup
Formats
JSON · CSV · the SQL below

What each column holds

Column definitions for Average distance from each ET clock mark to the closing print (SPY, trailing months), derived from the stored result.
ColumnTypeRangeNotes
et_time text 13 distinct values (09:30, 10:00, 10:30…)
avg_move_to_close_pct number 0.108 to 0.414 percent
observations number every row is 105

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.

WITH bars AS
(
    SELECT
        toDate(toTimeZone(window_start, 'America/New_York'))   AS session_date,
        toTimeZone(window_start, 'America/New_York')           AS et,
        toFloat64(close)                                       AS px
    FROM global_markets.delayed_stocks_minute_aggs
    WHERE ticker = 'SPY'
      AND window_start >= today() - 150
      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
),
final_print AS
(
    SELECT
        session_date,
        argMax(px, et) AS closing_px
    FROM bars
    GROUP BY session_date
)
SELECT
    formatDateTime(b.et, '%H:%i')                             AS et_time,
    round(avg(abs(f.closing_px / b.px - 1)) * 100, 3)         AS avg_move_to_close_pct,
    count()                                                   AS observations
FROM bars AS b
INNER JOIN final_print AS f ON f.session_date = b.session_date
WHERE toMinute(b.et) IN (0, 30)
GROUP BY et_time
ORDER BY et_time
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