New listings landing on a symbol that already had history

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 2026-08-22, from Why Ticker Symbols Break Your Dataset.

Rows × columns

11 × 3

Computed

2026-08-22

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

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 2026-08-22, and the query below is what returned them.

SELECT
    toString(toYear(i.listing_day))                          AS listing_year,
    count()                                                  AS listings,
    countIf(f.first_print < subtractDays(i.listing_day, 90))  AS symbols_with_earlier_history
FROM
(
    SELECT
        ticker,
        min(toDate(listing_date)) AS listing_day
    FROM global_markets.stocks_ipos
    WHERE listing_date >= '2016-01-01'
      AND listing_date < today()
    GROUP BY ticker
) AS i
INNER JOIN
(
    SELECT
        ticker,
        min(date) AS first_print
    FROM global_markets.stocks_daily_aggs
    GROUP BY ticker
) AS f ON f.ticker = i.ticker
GROUP BY listing_year
ORDER BY listing_year