AAPL prints by distance from the midpoint: share of volume and 60 second markout
Answered against 22 years of US equities and 12 years of US options data and published with the query that produced it. This result is stored as of 2026-08-13, from Why Market Makers Lose Money: Adverse Selection.
| distance_from_mid | share_of_volume_pct | edge_after_60s_mils |
|---|---|---|
| 0.5 cents or less | 27.58 | 0.95 |
| 0.5 to 1 cent | 18.05 | 7.56 |
| 1 to 2 cents | 21.18 | 12.49 |
| over 2 cents | 33.19 | 46.86 |
- Rows × columns
- 4 × 3
- Computed
- Completeness
- No missing values
- Source
- US exchange, SIP and OPRA market data
- Licence
- Strasmore terms · free, no signup
What each column holds
| Column | Type | Range | Notes |
|---|---|---|---|
distance_from_mid |
text | 4 distinct values | |
share_of_volume_pct |
number | 18.05 to 33.19 | percent |
edge_after_60s_mils |
number | 0.95 to 46.86 |
Computed from Strasmore's warehouse of US exchange, SIP and OPRA market data. Equity prices are delayed; options greeks and implied volatility are end-of-day. This result is stored, not recomputed on load — it is exactly the numbers that were returned on , and the query below is what returned them.
the exact SQL behind every number
WITH
qs AS (
SELECT toUnixTimestamp(toDateTime(sip_timestamp)) AS ts,
avg((toFloat64(bid_price) + toFloat64(ask_price)) / 2) AS mid
FROM global_markets.cache_stocks_quotes
WHERE ticker = 'AAPL'
AND sip_timestamp >= '2026-05-14 14:00:00'
AND sip_timestamp < '2026-05-14 17:06:00'
AND bid_price > 0 AND ask_price > bid_price
GROUP BY ts
),
fills AS (
SELECT t.ts AS ts, t.px AS px, t.shares AS shares, q.mid AS mid_at_fill,
if(t.px > q.mid, 1, -1) AS taker_side
FROM (
SELECT toUnixTimestamp(toDateTime(sip_timestamp)) AS ts,
toFloat64(price) AS px, toUInt64(size) AS shares
FROM global_markets.stocks_trades
WHERE ticker = 'AAPL'
AND sip_timestamp >= '2026-05-14 14:00:00'
AND sip_timestamp < '2026-05-14 17:00:00'
AND size > 0
) AS t
INNER JOIN qs AS q ON q.ts = t.ts
WHERE t.px != q.mid AND abs(t.px / q.mid - 1) < 0.02
)
SELECT
multiIf(s.cents <= 0.5, '0.5 cents or less',
s.cents <= 1.0, '0.5 to 1 cent',
s.cents <= 2.0, '1 to 2 cents',
'over 2 cents') AS distance_from_mid,
round(100 * sum(s.shares) / sum(sum(s.shares)) OVER (), 2) AS share_of_volume_pct,
round(1000 * avg(s.taker_side * (s.px - f.mid)), 2) AS edge_after_60s_mils
FROM (
SELECT *, toUInt32(ts + 60) AS future_ts, abs(px - mid_at_fill) * 100 AS cents
FROM fills
) AS s
INNER JOIN qs AS f ON f.ts = s.future_ts
GROUP BY distance_from_mid
ORDER BY min(s.cents)
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