{"slug":"implied-volatility-vs-vega","qid":"iv_coverage","label":"Contract days behind the weekly IV series, by month","post_title":"Implied Volatility vs Vega: The Difference","post_url":"/blog/implied-volatility-vs-vega#q-iv_coverage","columns":["month","month_label","aapl_contract_day_count","nvda_contract_day_count","ko_contract_day_count"],"rows":[{"month":"2025-08-01","month_label":"Aug 2025","aapl_contract_day_count":760,"nvda_contract_day_count":632,"ko_contract_day_count":849},{"month":"2025-09-01","month_label":"Sep 2025","aapl_contract_day_count":787,"nvda_contract_day_count":582,"ko_contract_day_count":828},{"month":"2025-10-01","month_label":"Oct 2025","aapl_contract_day_count":957,"nvda_contract_day_count":692,"ko_contract_day_count":928},{"month":"2025-11-01","month_label":"Nov 2025","aapl_contract_day_count":809,"nvda_contract_day_count":972,"ko_contract_day_count":687},{"month":"2025-12-01","month_label":"Dec 2025","aapl_contract_day_count":959,"nvda_contract_day_count":1093,"ko_contract_day_count":805},{"month":"2026-01-01","month_label":"Jan 2026","aapl_contract_day_count":833,"nvda_contract_day_count":623,"ko_contract_day_count":828},{"month":"2026-02-01","month_label":"Feb 2026","aapl_contract_day_count":781,"nvda_contract_day_count":542,"ko_contract_day_count":823},{"month":"2026-03-01","month_label":"Mar 2026","aapl_contract_day_count":871,"nvda_contract_day_count":596,"ko_contract_day_count":877},{"month":"2026-04-01","month_label":"Apr 2026","aapl_contract_day_count":834,"nvda_contract_day_count":631,"ko_contract_day_count":850},{"month":"2026-05-01","month_label":"May 2026","aapl_contract_day_count":967,"nvda_contract_day_count":1109,"ko_contract_day_count":874},{"month":"2026-06-01","month_label":"Jun 2026","aapl_contract_day_count":965,"nvda_contract_day_count":648,"ko_contract_day_count":877},{"month":"2026-07-01","month_label":"Jul 2026","aapl_contract_day_count":1111,"nvda_contract_day_count":714,"ko_contract_day_count":1040}],"shape":"series","sql":"SELECT\n    toString(toStartOfMonth(date))                AS month,\n    formatDateTime(toStartOfMonth(date), '%b %Y') AS month_label,\n    countIf(underlying_symbol = 'AAPL')           AS aapl_contract_day_count,\n    countIf(underlying_symbol = 'NVDA')           AS nvda_contract_day_count,\n    countIf(underlying_symbol = 'KO')             AS ko_contract_day_count\nFROM global_markets.options_greeks\nWHERE underlying_symbol IN ('AAPL', 'NVDA', 'KO')\n  AND date >= '2025-08-01'\n  AND date <  '2026-08-01'\n  AND iv_converged = 1\n  AND volume > 0\n  AND days_to_expiry BETWEEN 20 AND 45\n  AND abs(toFloat64(strike_price) / toFloat64(underlying_close) - 1) < 0.05\nGROUP BY month, month_label\nORDER BY month","computed_at":"2026-08-13T15:29:08.534843+00:00","elapsed":0.00217155}