Volume around one quarterly expiry: SPY June 19 vs September 18, 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 2026-08-09, from How to Read a Futures Symbol (ESZ6, CLF27).

Rows × columns

38 × 3

Period covered

2026-05-15 to 2026-07-10

Computed

2026-08-09

Completeness

No missing values

Source

US exchange, SIP and OPRA market data

Licence

Strasmore terms · free, no signup

Formats

JSON · CSV · the SQL below

What each column holds

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 2026-08-09, and the query below is what returned them.

SELECT
    toString(date)                                                            AS session_date,
    round(toFloat64(sumIf(volume, expiration_date = '2026-06-19')) / 1e6, 2)  AS jun_19_expiry_millions,
    round(toFloat64(sumIf(volume, expiration_date = '2026-09-18')) / 1e6, 2)  AS sep_18_expiry_millions
FROM global_markets.options_greeks
WHERE underlying_symbol = 'SPY'
  AND date >= '2026-05-15'
  AND date <= '2026-07-10'
  AND volume > 0
  AND iv_converged = 1
GROUP BY date
ORDER BY date