symbol_reuse
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 2026-10-02, from when-historical-market-data-is-revised.
| listing_year | symbols_reassigned | issuers_per_symbol |
|---|---|---|
| 2018 | 2 | 2 |
| 2019 | 1 | 2 |
| 2020 | 4 | 2 |
| 2021 | 4 | 2 |
| 2022 | 1 | 2 |
| 2023 | 2 | 2 |
| 2024 | 5 | 2 |
| 2025 | 26 | 2.04 |
| 2026 | 22 | 2.09 |
- Rows × columns
- 9 × 3
- Computed
- Completeness
- No missing values
- Source
- US exchange, SIP and OPRA market data
- Licence
- Strasmore terms · free, no signup
What each column holds
| Column | Type | Range | Notes |
|---|---|---|---|
listing_year |
text | 9 distinct values (2018, 2019, 2020…) | |
symbols_reassigned |
number | 1 to 26 | |
issuers_per_symbol |
number | 2 to 2.09 |
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 symbol_issuers AS
(
SELECT
ticker,
issuer_name,
min(listing_date) AS first_listing
FROM global_markets.stocks_ipos
WHERE listing_date >= '2010-01-01'
AND listing_date < '2026-10-01'
AND ticker != ''
AND ticker NOT IN ('SPCX')
GROUP BY ticker, issuer_name
),
reused AS
(
SELECT
ticker,
count() AS issuer_count,
max(first_listing) AS latest_listing
FROM symbol_issuers
GROUP BY ticker
HAVING issuer_count > 1
)
SELECT
toString(toYear(latest_listing)) AS listing_year,
count() AS symbols_reassigned,
round(avg(issuer_count), 2) AS issuers_per_symbol
FROM reused
GROUP BY listing_year
ORDER BY listing_year
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