The 9:30 bar vs. the 12:30 bar: SPY, AAPL, NVDA on July 2, 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 2026-07-26, from What Is the Opening Auction? How Stocks Open.
| ticker | bar_0930_open | official_open | bar_open_minus_official_cents | bar_0930_vol_k | bar_0930_trades | bar_1230_vol_k | x_0930_vs_1230 |
|---|---|---|---|---|---|---|---|
| SPY | 747.4 | 747.22 | 18 | 479 | 8632 | 133 | 3.6 |
| AAPL | 294.12 | 294.1 | 2 | 743 | 14662 | 121 | 6.1 |
| NVDA | 197.14 | 197.12 | 2 | 1688 | 36319 | 226 | 7.5 |
- Rows × columns
- 3 × 8
- 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 |
|---|---|---|---|
ticker |
text | 3 distinct values (AAPL, NVDA, SPY) | |
bar_0930_open |
number | 197.14 to 747.4 | US dollars |
official_open |
number | 197.12 to 747.22 | US dollars |
bar_open_minus_official_cents |
number | 2 to 18 | US dollars |
bar_0930_vol_k |
number | 479 to 1,688 | |
bar_0930_trades |
number | 8,632 to 36,319 | count |
bar_1230_vol_k |
number | 121 to 226 | |
x_0930_vs_1230 |
number | 3.6 to 7.5 |
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.
Run it yourself
This is the exact query behind the result above. Change a ticker, a date or a column and run it against the warehouse — no account, no key. The no-signup tier is smaller than the one this page was computed on; a query that reaches past it comes back saying which plan runs it.
WITH auctions AS (
SELECT ticker, toFloat64(argMax(price, (size, sip_timestamp))) AS official_open
FROM global_markets.stocks_trades
WHERE ticker IN ('SPY', 'AAPL', 'NVDA')
AND sip_timestamp >= '2026-07-02 00:00:00' AND sip_timestamp < '2026-07-03 00:00:00'
AND has(conditions, 17)
GROUP BY ticker
)
SELECT
b.ticker AS ticker,
toFloat64(anyIf(b.open, b.window_start = toDateTime('2026-07-02 09:30:00', 'America/New_York'))) AS bar_0930_open,
a.official_open AS official_open,
round(100 * (toFloat64(anyIf(b.open, b.window_start = toDateTime('2026-07-02 09:30:00', 'America/New_York'))) - a.official_open), 0) AS bar_open_minus_official_cents,
round(sumIf(b.volume, b.window_start = toDateTime('2026-07-02 09:30:00', 'America/New_York')) / 1e3) AS bar_0930_vol_k,
anyIf(b.transactions, b.window_start = toDateTime('2026-07-02 09:30:00', 'America/New_York')) AS bar_0930_trades,
round(sumIf(b.volume, b.window_start = toDateTime('2026-07-02 12:30:00', 'America/New_York')) / 1e3) AS bar_1230_vol_k,
round(sumIf(b.volume, b.window_start = toDateTime('2026-07-02 09:30:00', 'America/New_York')) / sumIf(b.volume, b.window_start = toDateTime('2026-07-02 12:30:00', 'America/New_York')), 1) AS x_0930_vs_1230
FROM global_markets.delayed_stocks_minute_aggs AS b
INNER JOIN auctions AS a ON a.ticker = b.ticker
WHERE b.ticker IN ('SPY', 'AAPL', 'NVDA')
AND b.window_start >= toDateTime('2026-07-02 00:00:00', 'America/New_York')
AND b.window_start < toDateTime('2026-07-03 00:00:00', 'America/New_York')
GROUP BY b.ticker, a.official_open
ORDER BY indexOf(['SPY', 'AAPL', 'NVDA'], b.ticker)
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