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

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Xetra Trading Hours and Holidays 2026–2027
Days when the New York open lands at 14:30 Frankfurt time (three-hour overlap), 2026 and 2027series · 2026-09-16 · 4×5Preview: a 4-point series, ending lower. Xetra non-trading days 2027, from the Deutsche Börse trading calendartable · 2026-09-16 · 8×5 Xetra non-trading days 2026, from the Deutsche Börse trading calendartable · 2026-09-16 · 8×5
What Is Backtesting in Trading?
Distance from one close to the next open, liquid names, 2025 (basis points)ranking · 2026-09-16 · 5×3Preview: 5 ranked values, largest first.
How to Backtest a Trading Strategy in Python
Three runs of backtest.py on the illustrative 60-bar fileranking · 2026-09-16 · 3×4Preview: 3 ranked values, smallest first.
Futures Tick Size and Tick Value Explained
Worked P&L examples: ticks moved x tick value x contracts (hypothetical)table · 2026-09-16 · 7×5 Outright tick size and tick value per contract, CME specifications, September 2026ranking · 2026-09-16 · 10×4Preview: 10 ranked values, smallest first. Calendar spread tick versus outright tick, dollars per contract, CME specifications, September 2026ranking · 2026-09-16 · 10×4Preview: 10 ranked values, smallest first.
Short Selling Bans Explained: US, Germany, EU
What ESMA measured during the 2020 bans (published estimates, % versus the control group)ranking · 2026-09-15 · 4×2Preview: 4 ranked values, largest first. Every outright short selling ban since 2008, dated to the order that set ittable · 2026-09-15 · 9×5
How to Read the US Equity Trade Tape
Two companies behind one symbol: TWTR on the daily barsseries · 2026-09-15 · 2×5Preview: a 2-point series, ending higher. The tape column on eight symbols, 2023-03-15ranking · 2026-09-15 · 8×3Preview: 8 ranked values, smallest first. Sessions and symbols on the tape, by yearseries · 2026-09-15 · 24×4Preview: a 16-point series, ending higher. Share of prints with a placeholder participant timestamp, one March session per year (IBM and MSFT)ranking · 2026-09-15 · 24×4Preview: 16 ranked values, smallest first. IBM's NYSE closing auction print: seconds after 4:00 p.m. ET, one March session per yearranking · 2026-09-15 · 17×4Preview: 16 ranked values, smallest first. Placeholder share by session, five large names, July to August 2015series · 2026-09-15 · 15×3Preview: a 15-point series, ending lower. The first session with a populated participant timestampscalar · 2026-09-15 · 1×26.41M Correction indicator counts on one session, fifteen large names, 2023-03-15ranking · 2026-09-15 · 5×3Preview: 5 ranked values, smallest first.
How to Short a Stock, Step by Step
Share of AAPL's reported off-exchange volume marked short, August 2026series · 2026-09-14 · 16×4Preview: a 16-point series, ending lower. Sessions with a 10%+ drop from the prior close, September 2024 through August 2026ranking · 2026-09-14 · 6×4Preview: 6 ranked values, largest first. Payments in lieu owed on a 100-share AAPL short, by ex-dividend dateseries · 2026-09-14 · 4×5Preview: a 4-point series, ending higher.
Short Positions in German Stocks: Bundesanzeiger
Illustrative: four published positions and the Short-Quote they add up toranking · 2026-09-13 · 5×2Preview: 5 ranked values, smallest first.
What Is an Implied Volatility Index? IV30 & VIX
AAPL near-the-money IV by expiration, June 15, 2026series · 2026-09-12 · 13×5Preview: a 13-point series, ending lower. The same IV30 recipe across six household names, June 15, 2026ranking · 2026-09-12 · 6×4Preview: 6 ranked values, largest first. AAPL IV30 rebuilt daily, with its near and far legs (June 15 to August 31, 2026)series · 2026-09-12 · 54×5Preview: a 16-point series, ending higher. The two expirations bracketing 30 days, and the IV30 they produce (AAPL, June 15, 2026)table · 2026-09-12 · 2×7
Single Stock Futures: CME's New Contracts
Deposit on a $10,000 position: Reg T stock margin versus the security futures floorranking · 2026-09-12 · 4×4Preview: 4 ranked values, largest first. Fair value of a 100 share future at an illustrative $100 spot and 4% financingranking · 2026-09-12 · 5×4Preview: 5 ranked values, smallest first.
The 7% Sell Rule Explained: O'Neil's Stop-Loss
Position size allowed by a $500 risk budget at each stop distanceranking · 2026-09-12 · 3×2Preview: 3 ranked values, largest first. Gain needed to get back to even after a lossranking · 2026-09-12 · 6×3Preview: 6 ranked values, smallest first.
How an IPO's Opening Price Is Set
A seasoned ticker's opening auction: QQQ minute volume around 9:30 ET, September 4, 2026series · 2026-09-12 · 5×2Preview: a 5-point series, ending higher. New symbols since June 2026: minutes between the 9:30 bell and the first print, ten heaviest first minutesseries · 2026-09-12 · 10×4Preview: a 10-point series, roughly flat.
Fed Call vs House Call vs Exchange Call
Where each margin call line falls: 200 shares carried against a $10,000 debittable · 2026-09-12 · 3×5 The $65 close: what each maintenance call demands, met by deposit or by saletable · 2026-09-12 · 2×7
Biggest Short Squeezes in History, Ranked
Peak multiple: highest print divided by the last close before the squeezeranking · 2026-09-12 · 5×4Preview: 5 ranked values, largest first. Market value swing: capitalization before the squeeze and at the peak, billionstable · 2026-09-12 · 2×5 Documented short-seller losses, billions, as estimated at the timetable · 2026-09-12 · 3×5
Stop Orders on Options: What Actually Triggers
One near-the-money SPY put, July 6 to July 17, 2026: daily close and day-over-day move next to SPY'sseries · 2026-09-11 · 10×5Preview: a 10-point series, ending lower. Near-the-money SPY puts (20-45 days to expiry), July 2026: size of the day-over-day close moveranking · 2026-09-11 · 4×3Preview: 4 ranked values, smallest first. AAPL option contracts on July 15, 2026, bucketed by full-day volumeranking · 2026-09-11 · 5×3Preview: 5 ranked values, largest first.
How Long Can You Hold a Short Position?
FINRA Rule 4210 maintenance margin per share short, by share priceranking · 2026-09-11 · 9×3Preview: 9 ranked values, smallest first. Daily and 30-day borrow cost on a $10,000 short, by annualized fee rateranking · 2026-09-11 · 7×3Preview: 7 ranked values, smallest first.
IV Term Structure: What the Curve Tells You
NVDA term structure either side of the February 26, 2025 report: median near-the-money IV by expiry bandranking · 2026-08-28 · 5×4Preview: 5 ranked values, largest first. NVDA front band vs 91-180 day band: median near-the-money IV per session, Feb 10 to Mar 14, 2025series · 2026-08-28 · 24×4Preview: a 16-point series, ending higher. IV term structure, six liquid names: median near-the-money implied volatility by expiry band, June 2026ranking · 2026-08-28 · 5×4Preview: 5 ranked values, smallest first. Share of sessions with an inverted curve: front band above the 91-180 day band, twelve months to July 31, 2026ranking · 2026-08-28 · 10×4Preview: 10 ranked values, largest first.
Probability of Touch vs Probability ITM
SPY through July 2024 against a level 2% above the July 1 closeseries · 2026-08-27 · 28×6Preview: a 16-point series, ending higher. SPY: touched versus finished above, 21-session forward windows since 2011table · 2026-08-27 · 4×5 SPY option delta buckets, with the doubling rule applied (Jan to Jun 2026)ranking · 2026-08-27 · 9×4Preview: 9 ranked values, smallest first.
Heston Model and the Volatility Smile
How far at-the-money implied volatility itself travelled (Jan to Jun 2026)ranking · 2026-08-26 · 6×4Preview: 6 ranked values, largest first. Near-the-money implied volatility by time to expiry (Jan to Jun 2026)ranking · 2026-08-26 · 6×3Preview: 6 ranked values, smallest first. SPY implied volatility by strike distance, 20 to 45 days to expiry (Jan to Jun 2026)ranking · 2026-08-26 · 13×4Preview: 13 ranked values, largest first. Put-side versus call-side implied volatility, 20 to 45 days (Jan to Jun 2026)ranking · 2026-08-26 · 6×4Preview: 6 ranked values, smallest first. Daily at-the-money implied volatility, SPY and NVDA (Apr to Jun 2026)series · 2026-08-26 · 62×3Preview: a 16-point series, ending higher.
How Implied Volatility Is Calculated
Where the Newton step misbehaves: AAPL vega by strike zone, June 30, 2026ranking · 2026-08-25 · 6×3Preview: 6 ranked values, largest first. At the money implied volatility and solver convergence, eight names, June 30, 2026ranking · 2026-08-25 · 8×4Preview: 8 ranked values, largest first. One solve per contract: AAPL implied volatility by strike zone, June 30, 2026ranking · 2026-08-25 · 6×3Preview: 6 ranked values, largest first. One AAPL contract, re-solved every session into its July 17, 2026 expiryseries · 2026-08-25 · 29×3Preview: a 16-point series, ending lower.
How Earnings Move Option Greeks
The Tesla $400 May call through its Q1 earnings (Apr 8 - May 6 2026)series · 2026-08-24 · 21×5Preview: a 16-point series, roughly flat. Tesla's 8-K filings across Q1 2026 (EDGAR index)table · 2026-08-24 · 4×3 Near-the-money Tesla May-expiry implied volatility around the printseries · 2026-08-24 · 21×3Preview: a 16-point series, ending higher.
Apple Stock Split History and Ratios
Apple's yearly price range, split-adjusted, 2012 through the current yearranking · 2026-08-24 · 15×4Preview: 15 ranked values, smallest first. Apple's daily closes around the most recent split, split-adjustedseries · 2026-08-24 · 10×4Preview: a 10-point series, roughly flat. Every Apple stock split and what one old share becomesseries · 2026-08-24 · 3×4Preview: a 3-point series, ending lower. The twelve months before each Apple splitranking · 2026-08-24 · 3×4Preview: 3 ranked values, smallest first.
What Is a Trade-Through? ISO Orders Explained
Where 30 minutes of AAPL prints landed, by venueranking · 2026-08-20 · 12×3Preview: 12 ranked values, largest first. Distinct venues printing AAPL inside the same second, minute by minuteseries · 2026-08-20 · 30×3Preview: a 16-point series, roughly flat. Share of prints by trade size: AAPL against KOranking · 2026-08-20 · 5×4Preview: 5 ranked values, largest first. Sale conditions that mark protection-rule exceptionstable · 2026-08-20 · 11×3
How Block Trades Print on the Tape
Which venues reported AAPL's largest prints, June 10, 2026ranking · 2026-08-20 · 12×3Preview: 12 ranked values, largest first. Execution-to-tape lag by print size, AAPL, June 10, 2026ranking · 2026-08-20 · 4×3Preview: 4 ranked values, smallest first. How AAPL's prints and volume split by trade size, June 10, 2026ranking · 2026-08-20 · 5×3Preview: 5 ranked values, largest first. AAPL volume minute by minute, 3:00 to 4:00 p.m. ET, June 10, 2026series · 2026-08-20 · 60×4Preview: a 16-point series, roughly flat. Sale conditions that flag a specially priced or out-of-sequence printtable · 2026-08-20 · 17×4
What Is a Special Memorandum Account (SMA)?
One margin account through four events: equity, requirement, and SMAtable · 2026-08-19 · 5×8
TSX Trading Hours and Holidays vs NYSE
US volume on five sessions when the TSX was closed and New York was openranking · 2026-08-19 · 5×4Preview: 5 ranked values, smallest first. Where US volume prints across the Eastern clock, July 2026series · 2026-08-19 · 16×3Preview: a 16-point series, roughly flat. How far Shopify's US price wanders after the 4 p.m. close, May to July 2026series · 2026-08-19 · 16×3Preview: a 16-point series, ending lower.
IPO Quiet Period Rules and Timeline
Days from announced deal to first trade, US listings since January 2025ranking · 2026-08-19 · 7×3Preview: 7 ranked values, largest first. The three clocks, dated, for the largest US listings since January 2025table · 2026-08-19 · 10×7
What Is IV Crush? Measured on Real Earnings
The biggest one-day ATM implied volatility collapses, June 1 - July 15, 2026series · 2026-08-18 · 12×6Preview: a 12-point series, ending lower. AVGO at-the-money implied volatility, daily, around the June 2026 reportseries · 2026-08-18 · 15×3Preview: a 15-point series, ending lower. The filing receipt: Broadcom's 8-K, first week of June 2026scalar · 2026-08-18 · 1×21
Does Theta Decay Over the Weekend?
Model decay per calendar step into the July 17, 2026 expiration (hypothetical at-the-money option)series · 2026-08-18 · 18×5Preview: a 16-point series, ending higher. Calendar days from each weekday's session to the next SPY sessionseries · 2026-08-18 · 5×3Preview: a 5-point series, ending higher. Average near-the-money SPY implied volatility by weekday, first half of 2026ranking · 2026-08-18 · 5×3Preview: 5 ranked values, smallest first. Average at-the-money SPY option premium by days to expiry, first half of 2026ranking · 2026-08-18 · 7×2Preview: 7 ranked values, smallest first.
Collar Option Greeks as the Stock Moves
Net collar gamma at 90, 30 and 7 days to expiryranking · 2026-08-18 · 5×4Preview: 5 ranked values, largest first. Net collar gamma, theta and vega across the price rangeranking · 2026-08-18 · 5×4Preview: 5 ranked values, largest first. Collar delta at five stock prices, 30 days to expirytable · 2026-08-18 · 5×5 AAPL implied volatility by strike distance, downside puts vs upside calls (May to July 2026)ranking · 2026-08-18 · 6×4Preview: 6 ranked values, smallest first.
Why Your RSI Differs Between Platforms
One session, one formula, different amounts of warm-upranking · 2026-08-17 · 10×3Preview: 10 ranked values, largest first. Where the minute bars actually are, by ET hourranking · 2026-08-17 · 16×3Preview: 16 ranked values, smallest first. RSI(14) on identical closes: Wilder's smoothing against a simple averageseries · 2026-08-17 · 60×4Preview: a 16-point series, ending lower. Two definitions of one daily close, side by sideseries · 2026-08-17 · 21×4Preview: a 16-point series, roughly flat.
Is High Implied Volatility Good? IV in Context
Implied volatility beside the movement each stock actually delivered over the prior 30 sessionsranking · 2026-08-17 · 11×4Preview: 11 ranked values, largest first. The same reading against each name's own 52-week implied volatility range (July 28, 2026)table · 2026-08-17 · 11×5 At-the-money implied volatility, eleven familiar tickers (July 28, 2026)ranking · 2026-08-17 · 11×2Preview: 11 ranked values, largest first. Where near-the-money implied volatility sat across the traded options market (July 28, 2026)ranking · 2026-08-17 · 6×4Preview: 6 ranked values, smallest first.
How Options Are Quoted in Volatility
One AAPL call: stock, premium and quoted vol, indexed to its first sessionseries · 2026-08-17 · 30×5Preview: a 16-point series, roughly flat.
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)
$