{"slug":"free-stock-market-data-api","qid":"iv_leaders","label":"End-of-day implied-volatility leaders, liquid underlyings","post_title":"Free Stock Market Data API, No Key Required","post_url":"/blog/free-stock-market-data-api#q-iv_leaders","columns":["ticker","avg_iv_pct"],"rows":[{"ticker":"CAPR","avg_iv_pct":298.4},{"ticker":"CYPH","avg_iv_pct":226},{"ticker":"SNXX","avg_iv_pct":203.8},{"ticker":"KORU","avg_iv_pct":201.5},{"ticker":"EVTL","avg_iv_pct":199.7},{"ticker":"MSTU","avg_iv_pct":194.3},{"ticker":"SOC","avg_iv_pct":189.9},{"ticker":"WOLF","avg_iv_pct":187.1},{"ticker":"CONL","avg_iv_pct":183.9},{"ticker":"MRNA","avg_iv_pct":183.2},{"ticker":"RAM","avg_iv_pct":182.4},{"ticker":"HIVE","avg_iv_pct":176.9}],"shape":"ranking","sql":"SELECT underlying_symbol AS ticker,\n       round(avg(implied_volatility) * 100, 1) AS avg_iv_pct\nFROM global_markets.options_greeks\nWHERE date = (SELECT max(date) FROM global_markets.options_greeks)\n  AND iv_converged\n  AND underlying_symbol NOT IN ('SPCX')\nGROUP BY underlying_symbol\nHAVING sum(volume) > 10000\nORDER BY avg_iv_pct DESC\nLIMIT 12","computed_at":"2026-08-22T04:06:30.274333+00:00","elapsed":0.058290406}