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The restricted names on January 28, 2021: prior close vs close (ET regular session)

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 GameStop, Jan 28, 2021: $483 to $112 by Noon.

as of ranking 5×4read in context →
The restricted names on January 28, 2021: prior close vs close (ET regular session) — 5 rows by 4 columns, computed from US exchange, SIP and OPRA data.
tickerclose_jan27close_jan28change_pct
AMC19.888.68-56.3
GME345197.44-42.8
BB25.0214.64-41.5
KOSS57.4139.04-32
NOK6.634.7-29.1
Rows × columns
5 × 4
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 The restricted names on January 28, 2021: prior close vs close (ET regular session), derived from the stored result.
ColumnTypeRangeNotes
ticker text 5 distinct values (AMC, BB, GME…)
close_jan27 number 6.63 to 345 US dollars
close_jan28 number 4.7 to 197.44 US dollars
change_pct number -56.3 to -29.1 percent

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.

the exact SQL behind every number 
SELECT
    ticker,
    round(argMaxIf(toFloat64(close), window_start, toDate(toTimeZone(window_start, 'America/New_York')) = '2021-01-27' AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959), 2) AS close_jan27,
    round(argMaxIf(toFloat64(close), window_start, toDate(toTimeZone(window_start, 'America/New_York')) = '2021-01-28' AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959), 2) AS close_jan28,
    round((argMaxIf(toFloat64(close), window_start, toDate(toTimeZone(window_start, 'America/New_York')) = '2021-01-28' AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959) / argMaxIf(toFloat64(close), window_start, toDate(toTimeZone(window_start, 'America/New_York')) = '2021-01-27' AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959) - 1) * 100, 1) AS change_pct
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker IN ('GME', 'AMC', 'BB', 'NOK', 'KOSS')
  AND window_start >= toDateTime('2021-01-27 00:00:00') AND window_start < toDateTime('2021-01-29 04:00:00')
GROUP BY ticker
ORDER BY change_pct ASC

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More from this analysisGameStop, Jan 28, 2021: $483 to $112 by Noon
GME reported short interest by settlement date: November 2020 to February 2021 ranking 8×3 → GME daily close and volume: December 1, 2020 to January 27, 2021 (as-traded prices) series 39×4 → GME by half-hour: January 28, 2021 regular session series 13×4 → GME daily close and volume: January 29 to February 9, 2021 series 8×4 → GME options trades by session: January 25–28, 2021 series 4×6 → GME on January 28, 2021: receipted (as-traded, pre-2022-split prices) scalar 1×14 → See all 2,170 queries →