The January Effect: Does It Still Work?
Every January on the daily tape, in trading sessionsranking ·
2026-08-11 · 23×2
Quote-Driven vs Order-Driven Markets
Quoted spread and displayed size at the NBBO, one June 2026 hourranking ·
2026-08-11 · 5×3
AAPL option trade sizes, one June 2026 sessionranking ·
2026-08-11 · 5×4
Share of consolidated volume reported off exchange, by monthseries ·
2026-08-11 · 12×5
How US share volume concentrates across symbols, May 2026ranking ·
2026-08-11 · 5×4
OTC Markets Tiers and SEC Rule 15c2-11
Sessions traded in June 2026, share of exchange-listed symbolsranking ·
2026-08-11 · 5×2
Distinct exchange-listed symbols printing a trade each month, 2021 and 2022series ·
2026-08-11 · 24×2
Exchange-listed symbols with a recent SEC periodic report, June 2026scalar ·
2026-08-11 · 1×313,024
Macro Picture Entering H2 2026, With Receipts
SPY month by month in H1 2026: regular-hours open-to-close return per monthranking ·
2026-08-11 · 6×4
The labor market, monthly: unemployment, participation, average hourly earnings, with ingest receiptstable ·
2026-08-11 · 6×5
Model-based inflation expectations by horizon, monthlyranking ·
2026-08-11 · 6×4
The Treasury curve at each month-end of H1 2026: bill, 2-year, 10-year, and the spreads between themtable ·
2026-08-11 · 6×8
CPI year-over-year, computed from the index against the same month a year earliertable ·
2026-08-11 · 6×5
CPI month-over-month, computed from the index against the prior monthranking ·
2026-08-11 · 6×3
The as-of receipts: every June print on file, the July CPI column armed as the next tripwirescalar ·
2026-08-11 · 1×51
How to De-Vig Betting Odds Into Probabilities
Implied probability by quote format, illustrative quotesranking ·
2026-08-11 · 5×2
De-vig methods on one lopsided market, -750 against +475ranking ·
2026-08-11 · 4×3
Book sum and overround on four illustrative marketsranking ·
2026-08-11 · 4×3
Dividend Reinvestment Plans (DRIPs) Explained
Days from ex-dividend date to cash: six household dividend payersranking ·
2026-08-11 · 6×4
KO: ex-dividend close against the pay date close, 2021 to 2026series ·
2026-08-11 · 22×5
Reinvestment events a year: a monthly payer against a quarterly payerranking ·
2026-08-11 · 10×3
How often listed payers distribute, trailing yearranking ·
2026-08-11 · 5×3
When Do Options Expire? Friday 4 PM ET & Daily
Who owns Wednesday: roots by distinct Wednesday-dated expirations, July 6-9, 2026 tapetable ·
2026-08-10 · 8×5
SPY options volume by June 2026 expiration date: a new expiry every sessionseries ·
2026-08-10 · 21×2
NVDA options volume by June 2026 expiration date: top six expiriesseries ·
2026-08-10 · 6×2
The July 2026 holiday move: SPY volume in contracts expiring Thursday July 2 vs Friday July 3scalar ·
2026-08-10 · 1×212.84
The rest of 2026, measured: each month's busiest forward expiration date, July 6-9 tapeseries ·
2026-08-10 · 6×5
June 2026 SPY options volume by days-to-expiry at the time of the tradeseries ·
2026-08-10 · 4×3
Options volume by expiration weekday: all US options traded June 1 - July 9, 2026series ·
2026-08-10 · 5×5
The daily-expiration club: every root with an expiry on all 21 June 2026 sessionsranking ·
2026-08-10 · 11×3
The Vendor Display Rule: SEC Rule 603(c)
Consolidated spread vs single venue spread, AAPL, June 17 2026series ·
2026-08-10 · 90×4
Where AAPL trades printed, June 17 2026, 10:00 to 11:30 ETranking ·
2026-08-10 · 17×3
Which venue held the national best bid in AAPL, June 17 2026, 10:00 to 11:30 ETranking ·
2026-08-10 · 16×3
International Fund NAV: Fair Value Pricing
The overnight and New York halves of the day, year by yearranking ·
2026-08-10 · 6×3
Foreign listings during New York hours, sorted by the US large cap moveranking ·
2026-08-10 · 5×4
Average move by New York half hour, two foreign listingsseries ·
2026-08-10 · 25×3
Where the daily move lands: overnight gap versus the New York sessionranking ·
2026-08-10 · 6×3
How Futures Margin Works: SPAN and Calls
SPY typical and largest daily move, month by month since 2019series ·
2026-08-10 · 91×4
Short term Treasury yields, the reference a stock margin loan is priced offseries ·
2026-08-10 · 91×4
One day move size across six household names, five years to July 2026ranking ·
2026-08-10 · 6×3
A decade of SPY daily closing moves, sorted into size bucketsranking ·
2026-08-10 · 6×3
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
Contango and Roll Yield in Commodity ETFs
Two listed crude oil funds, calendar year price changeranking ·
2026-08-10 · 5×4
Both funds rebased to 100 at the start of the window, month by monthseries ·
2026-08-10 · 60×4
The financing leg: 3 month and 1 year Treasury yields by monthseries ·
2026-08-10 · 91×4
SIP Feeds vs Direct Exchange Feeds
Which venues sat on the bid side of the quote record, KO on June 16, 2026ranking ·
2026-08-09 · 17×3
Quote update traffic across five household tickers, 10:00 to 11:00 a.m. ET on June 16, 2026table ·
2026-08-09 · 5×5
US equity exchanges that feed the consolidated tapetable ·
2026-08-09 · 18×4
Venue clock to consolidated tape clock, KO quotes on June 16, 2026series ·
2026-08-09 · 15×4
Reg T Margin vs Portfolio Margin Explained
SPY realized volatility and worst session, by calendar yearranking ·
2026-08-09 · 20×4
SPY daily moves and drawdown, February to April 2020series ·
2026-08-09 · 45×4
Worst one-session and five-session declines since January 2015ranking ·
2026-08-09 · 6×3
Average implied volatility by strike distance from spot, SPY, May to June 2026ranking ·
2026-08-09 · 9×3
Pin Risk at Options Expiration Explained
How far the Friday close lands from the nearest whole dollarranking ·
2026-08-09 · 10×3
AAPL's final half hour on its tightest monthly expiration close since 2025series ·
2026-08-09 · 30×5
Midpoint Peg Orders Explained: Half-Cent Fills
Sub-penny print share by reporting route, off exchange against lit exchangeranking ·
2026-08-09 · 6×3
Share of trades printed off the penny grid, 10:00 to 11:00 a.m. ET, June 17 2026ranking ·
2026-08-09 · 6×3
BLK quoted spread and quote activity by half-hour ET bucket, June 17 2026series ·
2026-08-09 · 16×3
Average NBBO spread and the midpoint saving, 10:00 to 11:00 a.m. ET, June 17 2026ranking ·
2026-08-09 · 6×3
Maker-Taker Fees and Rebates Explained
Where one liquid name's shares printed, by venue (Jul 15, 2026)ranking ·
2026-08-09 · 12×3
Registered US stock exchanges and their participant codestable ·
2026-08-09 · 18×5
One hour of NBBO spreads, measured in mils (Jul 15, 2026)ranking ·
2026-08-09 · 4×3
A 30 mil per share fee as basis points of notional, by price band (Jul 15, 2026)ranking ·
2026-08-09 · 6×3
How to Read a Futures Symbol (ESZ6, CLF27)
Volume around one quarterly expiry: SPY June 19 vs September 18, 2026series ·
2026-08-09 · 38×3
Delivery years live at the same time on one option calendar (SPY, July 2026)ranking ·
2026-08-09 · 3×4
Where long-dated option volume lands, by expiry month coderanking ·
2026-08-09 · 11×3
How Event Contracts Settle: Payout and Fees
Final-day call prices by where the strike sat against the priceranking ·
2026-08-09 · 12×3
Traded price against intrinsic value, by days to expirytable ·
2026-08-09 · 30×4
Where SPY option volume sits across the last 30 days of contract lifetable ·
2026-08-09 · 30×2
Cost Basis Methods: FIFO vs Specific ID
Cheapest to dearest monthly lot in 2024, five household tickersranking ·
2026-08-09 · 5×3
Twelve monthly AAPL lots, first regular session of each month of 2024series ·
2026-08-09 · 12×3
Realized gain per share on each 2024 lot, sold at the same June 2025 priceseries ·
2026-08-09 · 12×3
How Options Adjust After Mergers & Spinoffs
One deliverable, two companies: GE and GE HealthCare after the spinseries ·
2026-08-09 · 61×5
Near-the-money implied volatility into a cash close (ATVI, 2023)series ·
2026-08-09 · 83×4
A target stock pinning to its cash deal price (ATVI, 2023)series ·
2026-08-09 · 83×4
Stop Order vs Stop-Limit Order: How Each Fills
Average one-minute high-low range by time of dayseries ·
2026-08-08 · 13×3
Sessions that gapped through a 2% stop, and whether the limit price tradedranking ·
2026-08-08 · 5×3
NVDA's largest gap-down opens and the 30 minutes that followedseries ·
2026-08-08 · 8×3
How often each stock opened below the prior closeranking ·
2026-08-08 · 5×3
Professional vs Non-Professional Market Data
US equity and options venues in the exchange reference listranking ·
2026-08-08 · 6×3
AAPL quote messages per 15 minutes, pinned session of Jun 16, 2026series ·
2026-08-08 · 36×2
Listed option contracts that traded on Jun 16, 2026, by underlyingranking ·
2026-08-08 · 5×4
Quote message rate by symbol, 10:00 to 11:00 a.m. ET on Jun 16, 2026ranking ·
2026-08-08 · 5×3
Price-Time Priority vs Pro-Rata Fills
Quote updates per second and average quoted spread, ten minutes on 17 June 2026ranking ·
2026-08-08 · 5×3
Average shares per trade print, June 2026ranking ·
2026-08-08 · 8×2
AAPL option prints by contract count, 17 June 2026ranking ·
2026-08-08 · 5×2
AAPL trade prints by share count, 17 June 2026ranking ·
2026-08-08 · 5×2
How to Read a Form 4 Insider Trading Filing
Calendar days from transaction date to Form 4 filing dateranking ·
2026-08-08 · 6×3
Form 4 filings containing a sale: with an exercise on the same document, or withoutseries ·
2026-08-08 · 12×4
Share of Form 4 lines booked as indirect ownership, by transaction coderanking ·
2026-08-08 · 6×3
Share of reported Form 4 lines by transaction code, Aug 2025 to Jul 2026ranking ·
2026-08-08 · 7×3
Original Form 4 documents and Form 4/A amendments, by filing monthseries ·
2026-08-08 · 12×4
How OHLCV Bars Are Built From Ticks
Odd lot share of prints and of volume, minute by minuteseries ·
2026-08-08 · 15×4
How many of the 390 session minutes each US symbol traded inranking ·
2026-08-08 · 10×2
Trade condition codes that restrict high, low, and lastranking ·
2026-08-08 · 7×3
SPY volume by minute into the close, June 10 2026series ·
2026-08-08 · 25×3
One-minute AAPL bars rebuilt from individual trades, June 10 2026series ·
2026-08-08 · 15×6
Why Your Options Order Isn't Getting Filled
Apple option trades on June 17 2026: share of prints vs share of contracts, by trade sizeranking ·
2026-08-07 · 5×3
Apple option activity by strike distance, 20 to 45 days to expiry, May and June 2026ranking ·
2026-08-07 · 5×3
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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