Why Ticker Symbols Break Your Dataset
When each symbol last printed a daily barranking ·
2026-08-22 · 6×3
New listings landing on a symbol that already had historyranking ·
2026-08-22 · 11×3
Which share-class spellings actually carry historyranking ·
2026-08-22 · 4×4
Trading sessions per year under FB and METAranking ·
2026-08-22 · 15×3
ETF Relative Strength and Alpha Attribution
Annualized volatility and worst single session, trailing two yearsranking ·
2026-08-22 · 10×3
20-session return versus SPY across a nine-fund ETF universeranking ·
2026-08-22 · 9×3
Strongest and weakest sleeve versus SPY, by calendar monthseries ·
2026-08-22 · 13×4
Share of each fund's daily variation explained by SPY, trailing two yearsranking ·
2026-08-22 · 9×2
h5i-db: Point-in-Time Data for Backtests
Stock splits taking effect each quarter, forward and reverseseries ·
2026-08-22 · 16×3
When market headlines publish, by New York clock hourranking ·
2026-08-22 · 24×2
How long 13F holdings filings take to reach the publicseries ·
2026-08-22 · 16×3
Days between a dividend declaration and its ex-date, by monthseries ·
2026-08-22 · 24×3
When Equal Weight Beats Optimization
A rolling one year mean return, the number an optimizer would be fedseries ·
2026-08-16 · 96×3
Ten years of yearly estimates: the mean moves far more than the volatilityranking ·
2026-08-16 · 6×3
How far the mean and volatility estimates scatter by sample lengthranking ·
2026-08-16 · 5×4
Heston Model and the Volatility Smile
How far at-the-money implied volatility itself travelled (Jan to Jun 2026)ranking ·
2026-08-12 · 6×4
Near-the-money implied volatility by time to expiry (Jan to Jun 2026)ranking ·
2026-08-12 · 6×3
SPY implied volatility by strike distance, 20 to 45 days to expiry (Jan to Jun 2026)ranking ·
2026-08-12 · 13×4
Put-side versus call-side implied volatility, 20 to 45 days (Jan to Jun 2026)ranking ·
2026-08-12 · 6×4
Daily at-the-money implied volatility, SPY and NVDA (Apr to Jun 2026)series ·
2026-08-12 · 62×3
How Continuous Futures Contracts Are Built
Options volume by time left to expiry, AAPL, April to June 2026ranking ·
2026-08-10 · 5×2
KO quarterly dividend in cents and as a percent of the share price, 2016 to 2026series ·
2026-08-10 · 42×4
Can an AI Trading Track Record Be Verified?
Median quoted spread and the cost of a $25,000 round trip: midday hour, July 15, 2026ranking ·
2026-08-03 · 6×3
SPY holding-period outcomes since 2015: 5th percentile, median, 95th percentiletable ·
2026-08-03 · 4×7
How far SPY travels from its opening print, by ET half hour, first half of 2026series ·
2026-08-03 · 13×3
Six US index funds, identical window: price return, January 2 to June 30, 2026ranking ·
2026-08-03 · 6×3
Does Sell in May and Go Away Work?
Growth of one dollar: holding all year vs holding only November through Aprilranking ·
2026-08-03 · 21×3
The seasonal gap by era: average half-year returns and the spread between themtable ·
2026-08-03 · 3×6
S&P 500 tracker: May to October vs November to April, season by seasonranking ·
2026-08-03 · 21×3
Average S&P 500 tracker return by calendar month, May 2005 through April 2026table ·
2026-08-03 · 12×5
SPY distributions by ex-dividend month: inside the May to October window vs outside itranking ·
2026-08-03 · 19×3
Can an LLM Find Alpha Factors?
Training rank against holdout result: 240 trials cut into fifthsranking ·
2026-08-02 · 5×3
240 coin flip factors scored on real prices: annualized Sharpe, Jan 2016 to Jun 2021ranking ·
2026-08-02 · 8×3
The twelve best trials in training, re-scored on five untouched years (Jul 2021 to Jun 2026)ranking ·
2026-08-02 · 12×3
The best score climbs with the size of the search: best and average Sharpe by trials runranking ·
2026-08-02 · 9×3
Learn Quant Trading From an Open Source Book
Twelve months of daily moves: annualized volatility and worst session, eight namesranking ·
2026-08-02 · 8×3
US tickers trading in a June week, and how many still traded in June 2026ranking ·
2026-08-02 · 11×4
Average quoted spread by ET half hour: AAPL and KO, Friday July 17, 2026series ·
2026-08-02 · 16×3
Average distance from one session's close to the next session's open, monthlyseries ·
2026-08-02 · 24×4
Market Data Skills for AI Agents
Trading sessions per month: SPY bars, July 2025 through June 2026series ·
2026-08-01 · 12×4
Where the volume sits: share of June 2026 volume by half hour, New York timeseries ·
2026-08-01 · 32×3
One company, two tickers: share class volume split, June 2026ranking ·
2026-08-01 · 6×4
Minute bars per session: nine widely held names, June 2026series ·
2026-08-01 · 9×4
AI Daily Market Research Reports: What Breaks
SPY: average overnight repricing vs average regular-session move, monthlyseries ·
2026-08-01 · 24×3
What the next session did: 36 large caps bucketed by the prior day's move, Aug 2024 to Jul 2026table ·
2026-08-01 · 5×5
When headlines actually land: article counts by ET clock hour, July 2026ranking ·
2026-08-01 · 24×4
Headline coverage by size of daily move: 36 large caps, May to July 2026ranking ·
2026-08-01 · 5×4
Daily turnover in the top ten movers: fixed 36 name large-cap list, July 2026series ·
2026-08-01 · 21×3
Look-Ahead Bias: The Backtest Killer
Survivorship in the universe: names trading each year, share still listed in July 2026, and median returntable ·
2026-07-31 · 10×6
Same-bar decision vs a one-session lag: SPY, average session gain, 2016-2025table ·
2026-07-31 · 10×5
The hindsight ceiling: SPY buy and hold, the same year without its biggest up days, and perfect one-day foresighttable ·
2026-07-31 · 10×5
When each symbol last printed a daily bar
When each symbol last printed a daily bar
| ticker | last_print_label | days_since_last_print |
|---|---|---|
| TWTR | Oct 27, 2022 | 1395 |
| ABMD | Dec 21, 2022 | 1340 |
| ATVI | Oct 12, 2023 | 1045 |
| VMW | Nov 21, 2023 | 1005 |
| SGEN | Dec 13, 2023 | 983 |
| AAPL | Aug 21, 2026 | 1 |
the exact SQL behind every number
SELECT
ticker,
formatDateTime(max(date), '%b %e, %Y') AS last_print_label,
dateDiff('day', max(date), today()) AS days_since_last_print
FROM global_markets.stocks_daily_aggs
WHERE ticker IN ('ABMD', 'TWTR', 'ATVI', 'VMW', 'SGEN', 'AAPL')
AND date >= '2014-01-01'
GROUP BY ticker
ORDER BY days_since_last_print DESC
More from this analysisWhy Ticker Symbols Break Your Dataset
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