STRASMORE/EXPLORE 3,256 QUERIES 22Y EQUITIES · 12Y OPTIONS

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Why the Greeks Don't Add Up to Your P&L
Root sum of squared daily moves versus the net move, SPY by monthseries · 2026-10-09 · 12×4Preview: a 12-point series, roughly flat.
What Determines an Option's Price?
One AAPL call: premium and solved volatility, session by sessionseries · 2026-10-02 · 22×6Preview: a 16-point series, ending higher. Average solved volatility by time to expiry, near-the-money AAPL contractsranking · 2026-10-02 · 6×3Preview: 6 ranked values, smallest first. Reprice the same call, one input at a timeranking · 2026-10-02 · 6×4Preview: 6 ranked values, largest first. AAPL cash dividends and the yield they annualize toseries · 2026-10-02 · 13×4Preview: a 13-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.
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
Where to Get Historical Implied Volatility Data
Three ways to build a 30-day IV for SPY, from one set of rowsseries · 2026-08-15 · 53×6Preview: a 16-point series, ending higher. One name, one month: implied volatility by time to expiry (AAPL, June 2026)table · 2026-08-15 · 6×5 Median near-the-money IV, 20 to 45 days to expiry (June 2026)ranking · 2026-08-15 · 8×3Preview: 8 ranked values, largest first. Underlying names with converged daily IV, by quartertable · 2026-08-15 · 49×2
The Option Greeks Explained: Delta to Rho
One SPY $740 call's price over its 7-week life (expired Jun 18 2026)series · 2026-08-15 · 31×2Preview: a 16-point series, ending higher. Median greeks by time to expiration: every near-the-money US option, July 15, 2026table · 2026-08-15 · 5×6
What Is Volatility Skew? The Smile, Measured
SPY implied volatility by strike: OTM puts below spot, OTM calls above, July 15, 2026ranking · 2026-08-14 · 6×2Preview: 6 ranked values, largest first. OTM put IV vs OTM call IV across every active underlying, July 15, 2026scalar · 2026-08-14 · 1×4348 Steepest INVERTED skew: OTM calls pricier than OTM puts, July 15, 2026ranking · 2026-08-14 · 8×4Preview: 8 ranked values, largest first.
What Is Option Vega? Volatility Sensitivity
SPY call vega peaks at the money (~30 days out, 2026-07-13)ranking · 2026-08-13 · 5×2Preview: 5 ranked values, largest first. At-the-money SPY vega grows with time to expiry (2026-07-13)ranking · 2026-08-13 · 4×2Preview: 4 ranked values, smallest first. The SPY $740 call's implied volatility spiked when SPY fell, early June 2026series · 2026-08-13 · 31×2Preview: a 16-point series, ending higher.
What Is Implied Volatility? IV, Explained
ATM implied volatility across every actively traded underlying, July 15, 2026scalar · 2026-08-13 · 1×5753 SPY at-the-money IV by time to expiry: the term structure (2026-07-13)ranking · 2026-08-13 · 4×2Preview: 4 ranked values, smallest first. SPY put IV rises as strikes fall: the volatility skew (2026-07-13)ranking · 2026-08-13 · 5×2Preview: 5 ranked values, smallest first. SPY at-the-money implied volatility, month by month (Jul 2025 – Jul 2026)series · 2026-08-13 · 13×2Preview: a 13-point series, ending lower. At-the-money implied volatility by stock (2026-07-13)ranking · 2026-08-13 · 7×2Preview: 7 ranked values, largest first.
What Is Option Rho? The Interest Rate Greek
Weekly average rho: SPY January 2027 calls against a rolling front-month seriesseries · 2026-08-07 · 52×3Preview: a 16-point series, ending higher. Average SPY option rho by time to expiration, indexed to the front monthranking · 2026-08-07 · 6×4Preview: 6 ranked values, smallest first. Average rho on long-dated SPY options, by strike against the share priceranking · 2026-08-07 · 7×4Preview: 7 ranked values, largest first. Start-to-end change in Treasury yields by calendar year, in basis pointsranking · 2026-08-07 · 13×3Preview: 13 ranked values, smallest first.
How Option Greeks Change Over Time
The stock both options tracked: SPY, May 1 to Jun 15 2026series · 2026-07-16 · 31×3Preview: a 16-point series, ending higher. The $740 put's greeks, day by day (delta, gamma, theta, vega, IV%)series · 2026-07-16 · 31×7Preview: a 16-point series, ending higher. Call vs put on the same $740 strike: mirror-image pricesseries · 2026-07-16 · 31×4Preview: a 16-point series, ending lower. The $740 call's greeks, day by day (delta, gamma, theta, vega, IV%)series · 2026-07-16 · 31×7Preview: a 16-point series, ending higher.
What Is Option Theta? Time Decay Explained
The SPY $740 call's daily time decay deepens into expiry (May–Jun 2026)series · 2026-07-15 · 31×2Preview: a 16-point series, ending lower. At-the-money SPY time decay accelerates near expiry (2026-07-13)series · 2026-07-15 · 4×2Preview: a 4-point series, ending higher.
What Is Option Gamma? Delta's Accelerator
The $740 call's gamma climbs as expiry nearsseries · 2026-07-15 · 31×2Preview: a 16-point series, ending higher. SPY call gamma peaks at the money (~30 days out, 2026-07-13)ranking · 2026-07-15 · 5×2Preview: 5 ranked values, largest first. At-the-money SPY gamma by time to expiry (2026-07-13)ranking · 2026-07-15 · 4×2Preview: 4 ranked values, largest first.
What Is Option Delta? A Plain-English Guide
The $740 call's delta follows SPY across the strikeseries · 2026-07-15 · 31×3Preview: a 16-point series, ending higher. Call delta by moneyness: the S-curve (SPY, ~30 days out, 2026-07-13)ranking · 2026-07-15 · 5×2Preview: 5 ranked values, largest first.
Root sum of squared daily moves versus the net move, SPY by month

Root sum of squared daily moves versus the net move, SPY by month

most recentas of series 12×4read in context →
Root sum of squared daily moves versus the net move, SPY by month — 12 rows by 4 columns, computed from US exchange, SIP and OPRA data.
monthmonth_labelpath_move_pctnet_move_pct
2025-07Jul 20251.962.3
2025-08Aug 20253.42.09
2025-09Sep 20252.123.25
2025-10Oct 20254.082.44
2025-11Nov 20254.10.28
2025-12Dec 20252.410.19
2026-01Jan 20262.841.5
2026-02Feb 20263.580.8
2026-03Mar 20265.385.19
2026-04Apr 20263.9610.07
2026-05May 20262.925.17
2026-06Jun 20264.991.17
the exact SQL behind every number
WITH
    daily AS
    (
        SELECT
            date,
            toFloat64(any(close)) AS close_px
        FROM global_markets.stocks_daily_aggs
        WHERE ticker = 'SPY'
          AND date >= '2025-06-20'
          AND date <  '2026-07-01'
        GROUP BY date
    ),
    seq AS
    (
        SELECT *, row_number() OVER (ORDER BY date) AS n
        FROM daily
    ),
    steps AS
    (
        SELECT
            toStartOfMonth(b.date)      AS m,
            b.close_px / a.close_px - 1 AS ret
        FROM seq AS a
        INNER JOIN seq AS b ON b.n = a.n + 1
        WHERE b.date >= '2025-07-01'
    )
SELECT
    formatDateTime(m, '%Y-%m')             AS month,
    formatDateTime(m, '%b %Y')             AS month_label,
    round(100 * sqrt(sum(pow(ret, 2))), 2) AS path_move_pct,
    round(100 * abs(sum(ret)), 2)          AS net_move_pct
FROM steps
GROUP BY m
ORDER BY m
$