Form types on the gap day (June 30, 2026) against the trading day before it

Name: Form types on the gap day (June 30, 2026) against the trading day before it
Creator: Strasmore
Published: 2026-07-26
License: https://www.strasmore.com/terms/

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 2026-07-26, from SEC EDGAR Index Gap: the Missing Month-Ends.

as of 2026-07-26 ranking 14×3read in context →

Form types on the gap day (June 30, 2026) against the trading day before it — 14 rows by 3 columns, computed 2026-07-26 from US exchange, SIP and OPRA data.
form_type	normal_day_jun29	gap_day_jun30
EFFECT	0	15
MA-I/A	0	8
MA-I	0	4
QUALIF	0	2
ATS-N	0	1
ATS-N/MA	0	1
424B2	926	0
NPORT-P	622	0
4	595	0
1-Z	267	0
8-K	223	0
10-D	209	0
D	169	0
144	156	0

Rows × columns: 14 × 3
Computed: 2026-07-26
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 Form types on the gap day (June 30, 2026) against the trading day before it, derived from the stored result.
Column	Type	Range
`form_type`	text	14 distinct values (1-Z, 10-D, 144…)
`normal_day_jun29`	number	0 to 926
`gap_day_jun30`	number	0 to 15

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 2026-07-26, and the query below is what returned them.

the exact SQL behind every number

SELECT
    form_type,
    uniqExactIf(accession_number, filing_date = toDate('2026-06-29')) AS normal_day_jun29,
    uniqExactIf(accession_number, filing_date = toDate('2026-06-30')) AS gap_day_jun30
FROM global_markets.stocks_sec_edgar_index
WHERE filing_date IN (toDate('2026-06-29'), toDate('2026-06-30'))
GROUP BY form_type
ORDER BY gap_day_jun30 DESC, normal_day_jun29 DESC, form_type
LIMIT 14

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