AAPL quoted spread in five minute buckets, 9:00 to 11:00 a.m. ET (Sep 16, 2026)
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 2026-10-05, from What Price Does a Market Order Fill At?.
| et_time | avg_spread_cents | avg_spread_bps |
|---|---|---|
| 09:00 | 29.99 | 9.03 |
| 09:05 | 18.05 | 5.42 |
| 09:10 | 18.47 | 5.55 |
| 09:15 | 11.29 | 3.39 |
| 09:20 | 20.42 | 6.14 |
| 09:25 | 29.92 | 9 |
| 09:30 | 8.25 | 2.47 |
| 09:35 | 6.04 | 1.81 |
| 09:40 | 6.63 | 1.99 |
| 09:45 | 5.76 | 1.72 |
| 09:50 | 5.63 | 1.69 |
| 09:55 | 5.93 | 1.78 |
| 10:00 | 6.24 | 1.87 |
| 10:05 | 4.49 | 1.35 |
| 10:10 | 4.25 | 1.27 |
| 10:15 | 4.27 | 1.28 |
| 10:20 | 4.53 | 1.36 |
| 10:25 | 4.25 | 1.27 |
| 10:30 | 4.13 | 1.24 |
| 10:35 | 4.85 | 1.45 |
| 10:40 | 4.54 | 1.36 |
| 10:45 | 5.11 | 1.53 |
| 10:50 | 3.44 | 1.03 |
| 10:55 | 3.67 | 1.1 |
- Rows × columns
- 24 × 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 |
|---|---|---|---|
et_time |
text | 24 distinct values (09:00, 09:05, 09:10…) | |
avg_spread_cents |
number | 3.44 to 29.99 | |
avg_spread_bps |
number | 1.03 to 9.03 |
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.
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SELECT
formatDateTime(toStartOfInterval(toTimeZone(sip_timestamp, 'America/New_York'),
INTERVAL 5 MINUTE), '%H:%i') AS et_time,
round(avg(toFloat64(ask_price - bid_price)) * 100, 2) AS avg_spread_cents,
round(avg(toFloat64(ask_price - bid_price)
/ ((toFloat64(ask_price) + toFloat64(bid_price)) / 2)) * 10000, 2) AS avg_spread_bps
FROM global_markets.cache_stocks_quotes
WHERE ticker = 'AAPL'
AND sip_timestamp >= toDateTime('2026-09-16 13:00:00', 'UTC')
AND sip_timestamp < toDateTime('2026-09-16 15:00:00', 'UTC')
AND bid_price > 0
AND ask_price > bid_price
GROUP BY et_time
ORDER BY et_time
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