Implied Volatility Heatmap: How to Read It
One column of the heatmap: near the money AAPL IV by time to expiry, June 2026ranking ·
2026-10-02 · 6×3
One row of the heatmap: AAPL IV by moneyness, 25 to 35 days to expiry, June 2026ranking ·
2026-10-02 · 5×3
A raw IV colour scale across six names, week of June 15, 2026ranking ·
2026-10-02 · 6×3
The same week normalized: each name's IV against its own trailing yearranking ·
2026-10-02 · 6×4
How Long a Market Order Takes to Fill
Venue timestamp to consolidated feed, in microsecondsranking ·
2026-10-02 · 5×3
Median quoted spread in basis points, same sessionranking ·
2026-10-02 · 5×3
Prints in a pinned 30-minute window, five household namesranking ·
2026-10-02 · 5×4
Seconds between prints, by how often a name tradesranking ·
2026-10-02 · 5×3
How Are Event Contracts Taxed? 60/40 or Not
Illustrative at a 37% ordinary rate: tax on a $10,000 gain, and the deductible part of a $10,000 loss with no offsetting gainsranking ·
2026-10-02 · 3×3
Do NYSE and Nasdaq Have Public APIs?
Where AAPL shares printed during a single session, September 15, 2026ranking ·
2026-10-02 · 12×3
AAPL median quoted spread by New York clock time, September 15, 2026series ·
2026-10-02 · 61×3
Quote updates per second, one hour of the September 15, 2026 sessionranking ·
2026-10-02 · 5×2
US equity exchange operators and the venues each one runsranking ·
2026-10-02 · 9×3
AMZN Premarket and After-Hours Prices
The eight widest overnight gaps on AMZN, Oct 2023 through Sep 2025ranking ·
2026-10-02 · 8×3
AMZN quoted spread and inside size by ET hour, after the close into the next openranking ·
2026-10-02 · 11×3
AMZN share volume by ET clock hour (September 2025 sessions)ranking ·
2026-10-02 · 16×3
AMZN from the Jul 31, 2025 close through the next morning's first half hourranking ·
2026-10-02 · 20×3
When Do VIX Futures Expire? 2026 Dates
The walk-back arithmetic, step by step, for four contractstable ·
2026-10-01 · 4×7
Contract months since 2015 that did not settle on a Wednesdaytable ·
2026-10-01 · 5×4
Days between consecutive VIX futures settlements, 2026 cycleseries ·
2026-10-01 · 12×3
VIX futures final settlement dates, 2026 monthly contractsseries ·
2026-10-01 · 12×5
US Premarket and After-Hours in UK Time
SPY volume by New York hour, with the London clock beside itseries ·
2026-10-01 · 16×4
AAPL median quoted spread by hour across one full extended dayseries ·
2026-10-01 · 16×4
The London clock time of the 9:30am ET open, late October 2025series ·
2026-10-01 · 16×4
Tape A, B, and C Explained: CTA and UTP
Share of prints on each tape, by ET clock hour, across the same basketseries ·
2026-10-01 · 16×4
The tape carried by a basket of household symbols, one September 2026 sessionranking ·
2026-10-01 · 12×4
US listing exchanges and the tape each one assignstable ·
2026-10-01 · 7×5
Class-share symbols and the notation each tape usesranking ·
2026-10-01 · 10×4
Stocks With the Biggest IV-RV Gap
The most negative monthly pairs: realized volatility far above impliedranking ·
2026-10-01 · 10×4
SPY: monthly 30-day implied volatility against the next month's realized volatilityseries ·
2026-10-01 · 24×4
Largest gap between 30-day implied volatility and the realized volatility that followedranking ·
2026-10-01 · 12×4
Share of liquid names whose 30-day IV exceeded the realized volatility that followedseries ·
2026-10-01 · 9×4
Is the Market a Random Walk? Real Returns
Deepest fall: 400 matched random walks versus SPYranking ·
2026-10-01 · 5×4
Daily moves by sigma distance: counted versus a normal modelranking ·
2026-10-01 · 6×4
Consecutive down days: counted versus a fair cointable ·
2026-10-01 · 7×6
Excess kurtosis by year, against the full window levelranking ·
2026-10-01 · 21×4
Autocorrelation of returns and absolute returns, lags 1 to 10ranking ·
2026-10-01 · 10×3
How to Read an Event Contract Ladder
One threshold, re-read every session: implied probability above a fixed strikeseries ·
2026-10-01 · 28×3
A real strike ladder: SPY call prices by threshold, one pinned sessionranking ·
2026-10-01 · 12×3
Ladder audit by expiration: rung count, ordering breaks, and probability inside the 8% bandseries ·
2026-10-01 · 5×4
Differencing the rungs: probability above each threshold, and the bucket between themranking ·
2026-10-01 · 11×3
Index Rebalance Day and the Closing Auction
Half-hour volume shares on the June 2026 recon session vs the prior 20 sessionsseries ·
2026-10-01 · 14×3
Closing-minute volume on four rebalance sessions vs each name's 20-session medianranking ·
2026-10-01 · 12×4
Distance from the 3:50 p.m. price to the closing minute, in basis pointsranking ·
2026-10-01 · 12×3
Share of session volume printed in the 4:00 p.m. minute, June 2026series ·
2026-10-01 · 21×4
Do Volume Indicators Predict Anything?
OBV and VPT rebuilt from daily closes and volume, AAPL, Q2 2026series ·
2026-10-01 · 62×4
Forward returns after an OBV divergence vs matched confirmation daystable ·
2026-10-01 · 3×7
Divergence gap in 20-session forward return across four lookbackstable ·
2026-10-01 · 4×5
20-session OBV change vs trailing and forward returns, by tickerranking ·
2026-10-01 · 10×4
Backtesting in Illiquid Markets: Fill Models
Quoted spread and displayed size at the touch, midday sliceranking ·
2026-10-01 · 4×4
Median session volume and a 2 percent participation budgetranking ·
2026-10-01 · 4×4
Markout curve after a high volume minute, liquid name against thin nameranking ·
2026-10-01 · 6×4
Average absolute minute move by volume quintile, liquid name against thin nameranking ·
2026-10-01 · 5×4
What Exchange Colocation Costs Per Month
Quote updates in one hour, five names, 10:00 to 11:00 ET on 10 June 2026ranking ·
2026-09-30 · 5×3
SPY quote updates per millisecond, 10:00 to 10:05 ET on 10 June 2026ranking ·
2026-09-30 · 5×3
SPY trade messages per second by half hour, 10 June 2026series ·
2026-09-30 · 32×3
Warren Buffett's Index Put Trade Explained
Two index tracking funds, rebased to 100 at their first year in the recordranking ·
2026-09-30 · 22×3
Every 15 year stretch in the SPY record, by finishing levelranking ·
2026-09-30 · 4×4
Berkshire annual reported net income against operating cash flow ($bn)series ·
2026-09-30 · 10×4
SPY Dividends for Korean Investors
SPY trailing four-quarter distribution yield, measured at each ex-dateseries ·
2026-09-30 · 32×3
One US session in 30-minute slices, with the New York and Seoul clocks side by sideseries ·
2026-09-30 · 18×3
Days from ex-date to payment, every SPY distribution since 2019series ·
2026-09-30 · 31×4
Every SPY distribution since 2023: ex-date, pay date, cash per shareseries ·
2026-09-30 · 15×5
Self-Help Declarations Under Reg NMS Rule 611
US equity venues and reporting facilities in the exchange registrytable ·
2026-09-30 · 27×5
Locked NBBO rate before the open versus midday, five liquid namesranking ·
2026-09-30 · 5×4
Locked and crossed NBBO rates in AAPL by ET hour, June 10, 2026table ·
2026-09-30 · 16×5
Which venues supplied the national best bid in AAPL on June 10, 2026ranking ·
2026-09-30 · 12×3
Partial Assignment of Short Options
Option trade sizes on one AAPL session (May 14, 2026)ranking ·
2026-09-30 · 6×3
Contract lines traded into the May 2026 monthly expirationranking ·
2026-09-30 · 5×3
Mass Cancels and Purge Ports Explained
AAPL quoted spread in basis points, first hour of April 7, 2025series ·
2026-09-30 · 60×3
AAPL quote updates per second, volatile session vs quiet sessionseries ·
2026-09-30 · 54×4
How far AAPL travelled in each ten-minute bucket, same two sessionsseries ·
2026-09-30 · 54×3
Distinct option contracts that printed a trade on April 7, 2025ranking ·
2026-09-30 · 5×2
Free Stock API With curl and jq: No Key
KO daily closes, last 30 sessions returned by the free SQL endpointseries ·
2026-09-30 · 30×2
Buying Puts vs Buying Calls: Why Puts Cost More
The 25-delta wing spread on SPY, month by monthseries ·
2026-09-30 · 24×4
SPY implied volatility at equal distance out of the money, puts against callsranking ·
2026-09-30 · 6×4
Realised volatility inside SPY months, grouped by that month's returnranking ·
2026-09-30 · 4×3
At-the-money put minus call at the identical strike, six large capsranking ·
2026-09-30 · 6×4
Break-even move required on 5% out-of-the-money SPY puts and callsranking ·
2026-09-30 · 4×4
Why Trading Volume Dies at Midday: U-Shape
Share of regular-session volume by half hour, SPY and AAPLseries ·
2026-09-28 · 13×3
Average one-minute SPY range in basis points, by half hourseries ·
2026-09-28 · 13×3
SPY open, midday and close volume against an average minute, by yearranking ·
2026-09-28 · 8×4
Open, midday and close volume against an average session minuteranking ·
2026-09-28 · 6×4
Why Relative Volume Differs Between Platforms
Five relative-volume definitions on one AAPL session, at 10:30 a.m. ET and at the closeranking ·
2026-09-28 · 5×3
One AAPL session, four lookbacks: full-day relative volume from daily barsranking ·
2026-09-28 · 4×4
How the session's volume piled up against the prior 10 sessions, checkpoint by checkpointseries ·
2026-09-28 · 14×4
Same session, same 10-session lookback: same-time basis vs full-day basis through the dayseries ·
2026-09-28 · 14×3
When Do Mutual Funds Trade? NAV Pricing at 4 pm
The same 15 sessions, summarized: the close's floor, average, and peakscalar ·
2026-09-28 · 1×417.7
SPY volume share of the final 30 minutes and final minute: last 15 sessions through July 10, 2026series ·
2026-09-28 · 15×3
Month-end sessions vs all other sessions: SPY close concentration, January–June 2026scalar ·
2026-09-28 · 1×76
The spread a fund buyer never pays: median quoted spread, July 10, 2026 regular sessionranking ·
2026-09-28 · 3×3
How much of SPY's day trades at the very end: July 10, 2026 regular sessionscalar ·
2026-09-28 · 1×324.6
The print NAV is struck from: AAPL's closing auction cross, July 10, 2026scalar ·
2026-09-28 · 1×65.47
When Did the US Stock Market Start? 1792
Trading sessions by day of the week, calendar year 2019series ·
2026-09-28 · 7×3
Where SPY volume lands inside the day, 30 minute buckets, October 2024series ·
2026-09-28 · 32×3
The single busiest clock minute of the month, October 2024ranking ·
2026-09-28 · 5×3
Weekdays with no US equity session, 2014 through 2023ranking ·
2026-09-28 · 10×2
What Is Triple Witching? Volume & Volatility
Witching Thursday vs. the two ordinary Fridays before it: US option contracts traded, and the same-day-expiring shareseries ·
2026-09-28 · 3×4
SPY on witching sessions vs. the same month's other sessions: intraday range and net move (% of the open)series ·
2026-09-28 · 8×5
Every quarterly witching session since September 2024: market-wide share volume vs. the month's other sessionsseries ·
2026-09-28 · 8×5
ZM at-the-money IV by days to expiry, most recent week of data
ZM at-the-money IV by days to expiry, most recent week of data
| dte_bucket | atm_iv_pct | contract_count | as_of |
|---|---|---|---|
| 0 to 10 days | 53.8 | 162 | Oct 22, 2026 |
| 11 to 30 days | 42.9 | 149 | Oct 22, 2026 |
| 31 to 60 days | 44.7 | 83 | Oct 22, 2026 |
| 61 to 120 days | 45 | 47 | Oct 22, 2026 |
| over 120 days | 44.7 | 71 | Oct 22, 2026 |
the exact SQL behind every number
SELECT
multiIf(days_to_expiry <= 10, '0 to 10 days',
days_to_expiry <= 30, '11 to 30 days',
days_to_expiry <= 60, '31 to 60 days',
days_to_expiry <= 120, '61 to 120 days',
'over 120 days') AS dte_bucket,
round(100 * avg(toFloat64(implied_volatility)), 1) AS atm_iv_pct,
count() AS contract_count,
formatDateTime(max(date), '%b %e, %Y') AS as_of
FROM global_markets.options_greeks
WHERE underlying_symbol = 'ZM'
AND iv_converged = 1
AND volume > 0
AND toFloat64(underlying_close) > 0
AND abs(toFloat64(strike_price) / toFloat64(underlying_close) - 1) < 0.05
AND date >= (
SELECT max(date)
FROM global_markets.options_greeks
WHERE underlying_symbol = 'ZM' AND iv_converged = 1
) - 7
GROUP BY dte_bucket
ORDER BY min(days_to_expiry)
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