STRASMORE/EXPLORE 2,170 QUERIES

Did it hold? The retest that never came, and two recovery clocks

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 March 24, 2020: The Day the Market Turned.

as of scalar 1×12read in context →
feb19 ath close
338.31
mar23 bottom close
222.51
recovery date
2020-08-18
sessions to new high
103
days low to new high
148
round trip days
181
lowest close after
243.59
lowest close date
2020-03-24
closest retest pct
9.5
peak 2007 date
2007-10-09
recovery 2013 date
2013-03-14
round trip 2008 days
1,983
Rows × columns
1 × 12
Period covered
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 Did it hold? The retest that never came, and two recovery clocks, derived from the stored result.
ColumnTypeRangeNotes
feb19_ath_close number every row is 338.31 US dollars
mar23_bottom_close number every row is 222.51 US dollars
recovery_date date 2020-08-18
sessions_to_new_high number every row is 103 US dollars
days_low_to_new_high number every row is 148 US dollars
round_trip_days number every row is 181
lowest_close_after number every row is 243.59 US dollars
lowest_close_date date 2020-03-24
closest_retest_pct number every row is 9.5 percent
peak_2007_date date 2007-10-09
recovery_2013_date date 2013-03-14
round_trip_2008_days number every row is 1,983

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
    round(ath_close, 2) AS feb19_ath_close,
    round(bottom_close, 2) AS mar23_bottom_close,
    toString(rec_date) AS recovery_date,
    countIf(et_date > toDate('2020-03-23') AND et_date <= rec_date) AS sessions_to_new_high,
    dateDiff('day', toDate('2020-03-23'), rec_date) AS days_low_to_new_high,
    dateDiff('day', toDate('2020-02-19'), rec_date) AS round_trip_days,
    round(minIf(close_usd, et_date > toDate('2020-03-23') AND et_date <= rec_date), 2) AS lowest_close_after,
    toString(argMinIf(et_date, (close_usd, et_date), et_date > toDate('2020-03-23') AND et_date <= rec_date)) AS lowest_close_date,
    round((minIf(close_usd, et_date > toDate('2020-03-23') AND et_date <= rec_date) / bottom_close - 1) * 100, 1) AS closest_retest_pct,
    toString(peak07_date) AS peak_2007_date,
    toString(rec07_date) AS recovery_2013_date,
    dateDiff('day', peak07_date, rec07_date) AS round_trip_2008_days
FROM (
    SELECT
        et_date, close_usd, ath_close, bottom_close, peak07_date,
        min(if(et_date > toDate('2020-03-23') AND close_usd >= ath_close, et_date, toDate('2099-01-01'))) OVER () AS rec_date,
        min(if(et_date >= toDate('2008-01-01') AND close_usd >= peak07_close, et_date, toDate('2099-01-01'))) OVER () AS rec07_date
    FROM (
        SELECT
            et_date, close_usd,
            max(if(et_date = toDate('2020-02-19'), close_usd, -999)) OVER () AS ath_close,
            max(if(et_date = toDate('2020-03-23'), close_usd, -999)) OVER () AS bottom_close,
            max(if(et_date >= toDate('2007-01-01') AND et_date < toDate('2008-01-01'), (close_usd, et_date), (-999., toDate('1970-01-01')))) OVER () .1 AS peak07_close,
            max(if(et_date >= toDate('2007-01-01') AND et_date < toDate('2008-01-01'), (close_usd, et_date), (-999., toDate('1970-01-01')))) OVER () .2 AS peak07_date
        FROM (
            SELECT
                toDate(toTimeZone(window_start, 'America/New_York')) AS et_date,
                argMaxIf(toFloat64(close), window_start, (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959) AS close_usd
            FROM global_markets.delayed_stocks_minute_aggs
            WHERE ticker = 'SPY' AND window_start < toDateTime('2021-01-01 00:00:00')
            GROUP BY et_date
            HAVING close_usd > 0
        )
    )
)
GROUP BY ath_close, bottom_close, rec_date, peak07_date, rec07_date

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