STRASMORE/EXPLORE 3,293 QUERIES 22Y EQUITIES · 12Y OPTIONS

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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 · 6×3Preview: 6 ranked values, largest first. One row of the heatmap: AAPL IV by moneyness, 25 to 35 days to expiry, June 2026ranking · 2026-10-02 · 5×3Preview: 5 ranked values, largest first. A raw IV colour scale across six names, week of June 15, 2026ranking · 2026-10-02 · 6×3Preview: 6 ranked values, largest first. The same week normalized: each name's IV against its own trailing yearranking · 2026-10-02 · 6×4Preview: 6 ranked values, largest first.
How Long a Market Order Takes to Fill
Venue timestamp to consolidated feed, in microsecondsranking · 2026-10-02 · 5×3Preview: 5 ranked values, smallest first. Median quoted spread in basis points, same sessionranking · 2026-10-02 · 5×3Preview: 5 ranked values, largest first. Prints in a pinned 30-minute window, five household namesranking · 2026-10-02 · 5×4Preview: 5 ranked values, largest first. Seconds between prints, by how often a name tradesranking · 2026-10-02 · 5×3Preview: 5 ranked values, largest first.
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 · 3×3Preview: 3 ranked values, smallest first.
Do NYSE and Nasdaq Have Public APIs?
Where AAPL shares printed during a single session, September 15, 2026ranking · 2026-10-02 · 12×3Preview: 12 ranked values, largest first. AAPL median quoted spread by New York clock time, September 15, 2026series · 2026-10-02 · 61×3Preview: a 16-point series, ending higher. Quote updates per second, one hour of the September 15, 2026 sessionranking · 2026-10-02 · 5×2Preview: 5 ranked values, largest first. US equity exchange operators and the venues each one runsranking · 2026-10-02 · 9×3Preview: 9 ranked values, largest first.
AMZN Premarket and After-Hours Prices
The eight widest overnight gaps on AMZN, Oct 2023 through Sep 2025ranking · 2026-10-02 · 8×3Preview: 8 ranked values, smallest first. AMZN quoted spread and inside size by ET hour, after the close into the next openranking · 2026-10-02 · 11×3Preview: 11 ranked values, largest first. AMZN share volume by ET clock hour (September 2025 sessions)ranking · 2026-10-02 · 16×3Preview: 16 ranked values, largest first. AMZN from the Jul 31, 2025 close through the next morning's first half hourranking · 2026-10-02 · 20×3Preview: 16 ranked values, largest first.
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 · 12×3Preview: a 12-point series, ending lower. VIX futures final settlement dates, 2026 monthly contractsseries · 2026-10-01 · 12×5Preview: a 12-point series, ending lower.
US Premarket and After-Hours in UK Time
SPY volume by New York hour, with the London clock beside itseries · 2026-10-01 · 16×4Preview: a 16-point series, roughly flat. AAPL median quoted spread by hour across one full extended dayseries · 2026-10-01 · 16×4Preview: a 16-point series, roughly flat. The London clock time of the 9:30am ET open, late October 2025series · 2026-10-01 · 16×4Preview: a 16-point series, roughly flat.
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 · 16×4Preview: a 16-point series, ending higher. The tape carried by a basket of household symbols, one September 2026 sessionranking · 2026-10-01 · 12×4Preview: 12 ranked values, smallest first. 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 · 10×4Preview: 10 ranked values, smallest first.
Stocks With the Biggest IV-RV Gap
The most negative monthly pairs: realized volatility far above impliedranking · 2026-10-01 · 10×4Preview: 10 ranked values, largest first. SPY: monthly 30-day implied volatility against the next month's realized volatilityseries · 2026-10-01 · 24×4Preview: a 16-point series, roughly flat. Largest gap between 30-day implied volatility and the realized volatility that followedranking · 2026-10-01 · 12×4Preview: 12 ranked values, largest first. Share of liquid names whose 30-day IV exceeded the realized volatility that followedseries · 2026-10-01 · 9×4Preview: a 9-point series, ending lower.
Is the Market a Random Walk? Real Returns
Deepest fall: 400 matched random walks versus SPYranking · 2026-10-01 · 5×4Preview: 5 ranked values, smallest first. Daily moves by sigma distance: counted versus a normal modelranking · 2026-10-01 · 6×4Preview: 6 ranked values, largest first. 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 · 21×4Preview: 16 ranked values, smallest first. Autocorrelation of returns and absolute returns, lags 1 to 10ranking · 2026-10-01 · 10×3Preview: 10 ranked values, smallest first.
How to Read an Event Contract Ladder
One threshold, re-read every session: implied probability above a fixed strikeseries · 2026-10-01 · 28×3Preview: a 16-point series, ending lower. A real strike ladder: SPY call prices by threshold, one pinned sessionranking · 2026-10-01 · 12×3Preview: 12 ranked values, smallest first. Ladder audit by expiration: rung count, ordering breaks, and probability inside the 8% bandseries · 2026-10-01 · 5×4Preview: a 5-point series, roughly flat. Differencing the rungs: probability above each threshold, and the bucket between themranking · 2026-10-01 · 11×3Preview: 11 ranked values, smallest first.
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 · 14×3Preview: a 14-point series, ending lower. Closing-minute volume on four rebalance sessions vs each name's 20-session medianranking · 2026-10-01 · 12×4Preview: 12 ranked values, largest first. Distance from the 3:50 p.m. price to the closing minute, in basis pointsranking · 2026-10-01 · 12×3Preview: 12 ranked values, largest first. Share of session volume printed in the 4:00 p.m. minute, June 2026series · 2026-10-01 · 21×4Preview: a 16-point series, ending lower.
Do Volume Indicators Predict Anything?
OBV and VPT rebuilt from daily closes and volume, AAPL, Q2 2026series · 2026-10-01 · 62×4Preview: a 16-point series, ending higher. 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 · 10×4Preview: 10 ranked values, largest first.
Backtesting in Illiquid Markets: Fill Models
Quoted spread and displayed size at the touch, midday sliceranking · 2026-10-01 · 4×4Preview: 4 ranked values, largest first. Median session volume and a 2 percent participation budgetranking · 2026-10-01 · 4×4Preview: 4 ranked values, largest first. Markout curve after a high volume minute, liquid name against thin nameranking · 2026-10-01 · 6×4Preview: 6 ranked values, smallest first. Average absolute minute move by volume quintile, liquid name against thin nameranking · 2026-10-01 · 5×4Preview: 5 ranked values, smallest first.
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 · 5×3Preview: 5 ranked values, largest first. SPY quote updates per millisecond, 10:00 to 10:05 ET on 10 June 2026ranking · 2026-09-30 · 5×3Preview: 5 ranked values, largest first. SPY trade messages per second by half hour, 10 June 2026series · 2026-09-30 · 32×3Preview: a 16-point series, roughly flat.
Warren Buffett's Index Put Trade Explained
Two index tracking funds, rebased to 100 at their first year in the recordranking · 2026-09-30 · 22×3Preview: 16 ranked values, smallest first. Every 15 year stretch in the SPY record, by finishing levelranking · 2026-09-30 · 4×4Preview: 4 ranked values, largest first. Berkshire annual reported net income against operating cash flow ($bn)series · 2026-09-30 · 10×4Preview: a 10-point series, roughly flat.
SPY Dividends for Korean Investors
SPY trailing four-quarter distribution yield, measured at each ex-dateseries · 2026-09-30 · 32×3Preview: a 16-point series, ending lower. One US session in 30-minute slices, with the New York and Seoul clocks side by sideseries · 2026-09-30 · 18×3Preview: a 16-point series, ending higher. Days from ex-date to payment, every SPY distribution since 2019series · 2026-09-30 · 31×4Preview: a 16-point series, roughly flat. Every SPY distribution since 2023: ex-date, pay date, cash per shareseries · 2026-09-30 · 15×5Preview: a 15-point series, ending higher.
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 · 5×4Preview: 5 ranked values, largest first. 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 · 12×3Preview: 12 ranked values, largest first.
Partial Assignment of Short Options
Option trade sizes on one AAPL session (May 14, 2026)ranking · 2026-09-30 · 6×3Preview: 6 ranked values, largest first. Contract lines traded into the May 2026 monthly expirationranking · 2026-09-30 · 5×3Preview: 5 ranked values, largest first.
Mass Cancels and Purge Ports Explained
AAPL quoted spread in basis points, first hour of April 7, 2025series · 2026-09-30 · 60×3Preview: a 16-point series, ending lower. AAPL quote updates per second, volatile session vs quiet sessionseries · 2026-09-30 · 54×4Preview: a 16-point series, ending lower. How far AAPL travelled in each ten-minute bucket, same two sessionsseries · 2026-09-30 · 54×3Preview: a 16-point series, ending lower. Distinct option contracts that printed a trade on April 7, 2025ranking · 2026-09-30 · 5×2Preview: 5 ranked values, largest first.
Free Stock API With curl and jq: No Key
KO daily closes, last 30 sessions returned by the free SQL endpointseries · 2026-09-30 · 30×2Preview: a 16-point series, ending lower.
Buying Puts vs Buying Calls: Why Puts Cost More
The 25-delta wing spread on SPY, month by monthseries · 2026-09-30 · 24×4Preview: a 16-point series, roughly flat. SPY implied volatility at equal distance out of the money, puts against callsranking · 2026-09-30 · 6×4Preview: 6 ranked values, smallest first. Realised volatility inside SPY months, grouped by that month's returnranking · 2026-09-30 · 4×3Preview: 4 ranked values, largest first. At-the-money put minus call at the identical strike, six large capsranking · 2026-09-30 · 6×4Preview: 6 ranked values, largest first. Break-even move required on 5% out-of-the-money SPY puts and callsranking · 2026-09-30 · 4×4Preview: 4 ranked values, smallest first.
Why Trading Volume Dies at Midday: U-Shape
Share of regular-session volume by half hour, SPY and AAPLseries · 2026-09-28 · 13×3Preview: a 13-point series, ending lower. Average one-minute SPY range in basis points, by half hourseries · 2026-09-28 · 13×3Preview: a 13-point series, ending lower. SPY open, midday and close volume against an average minute, by yearranking · 2026-09-28 · 8×4Preview: 8 ranked values, smallest first. Open, midday and close volume against an average session minuteranking · 2026-09-28 · 6×4Preview: 6 ranked values, smallest first.
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 · 5×3Preview: 5 ranked values, smallest first. One AAPL session, four lookbacks: full-day relative volume from daily barsranking · 2026-09-28 · 4×4Preview: 4 ranked values, largest first. How the session's volume piled up against the prior 10 sessions, checkpoint by checkpointseries · 2026-09-28 · 14×4Preview: a 14-point series, ending higher. Same session, same 10-session lookback: same-time basis vs full-day basis through the dayseries · 2026-09-28 · 14×3Preview: a 14-point series, ending higher.
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 · 15×3Preview: a 15-point series, ending lower. 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 · 3×3Preview: 3 ranked values, smallest first. 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 · 7×3Preview: a 7-point series, roughly flat. Where SPY volume lands inside the day, 30 minute buckets, October 2024series · 2026-09-28 · 32×3Preview: a 16-point series, roughly flat. The single busiest clock minute of the month, October 2024ranking · 2026-09-28 · 5×3Preview: 5 ranked values, largest first. Weekdays with no US equity session, 2014 through 2023ranking · 2026-09-28 · 10×2Preview: 10 ranked values, smallest first.
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 · 3×4Preview: a 3-point series, ending higher. SPY on witching sessions vs. the same month's other sessions: intraday range and net move (% of the open)series · 2026-09-28 · 8×5Preview: a 8-point series, ending higher. Every quarterly witching session since September 2024: market-wide share volume vs. the month's other sessionsseries · 2026-09-28 · 8×5Preview: a 8-point series, ending lower.
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

most recentas of ranking 5×4read in context →
ZM at-the-money IV by days to expiry, most recent week of data — 5 rows by 4 columns, computed from US exchange, SIP and OPRA data.
dte_bucketatm_iv_pctcontract_countas_of
0 to 10 days53.8162Oct 22, 2026
11 to 30 days42.9149Oct 22, 2026
31 to 60 days44.783Oct 22, 2026
61 to 120 days4547Oct 22, 2026
over 120 days44.771Oct 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)
$