{"slug":"market-data-skills-for-ai-agents","qid":"bar_coverage","label":"Minute bars per session: nine widely held names, June 2026","post_title":"Market Data Skills for AI Agents","post_url":"/blog/market-data-skills-for-ai-agents#q-bar_coverage","columns":["ticker","sessions_with_data","median_bars_per_session","quietest_session_bars"],"rows":[{"ticker":"NVDA","sessions_with_data":21,"median_bars_per_session":954,"quietest_session_bars":936},{"ticker":"QQQ","sessions_with_data":21,"median_bars_per_session":946,"quietest_session_bars":925},{"ticker":"MSFT","sessions_with_data":21,"median_bars_per_session":921,"quietest_session_bars":876},{"ticker":"SPY","sessions_with_data":21,"median_bars_per_session":909,"quietest_session_bars":860},{"ticker":"AAPL","sessions_with_data":21,"median_bars_per_session":858,"quietest_session_bars":784},{"ticker":"XOM","sessions_with_data":21,"median_bars_per_session":505,"quietest_session_bars":447},{"ticker":"KO","sessions_with_data":21,"median_bars_per_session":502,"quietest_session_bars":470},{"ticker":"PG","sessions_with_data":21,"median_bars_per_session":422,"quietest_session_bars":404},{"ticker":"JNJ","sessions_with_data":21,"median_bars_per_session":418,"quietest_session_bars":399}],"shape":"series","sql":"WITH daily AS (\n    SELECT ticker,\n           toDate(toTimeZone(window_start, 'America/New_York')) AS session_date,\n           count() AS bars\n    FROM global_markets.delayed_stocks_minute_aggs\n    WHERE ticker IN ('SPY', 'QQQ', 'NVDA', 'AAPL', 'MSFT', 'XOM', 'JNJ', 'KO', 'PG')\n      AND toDate(toTimeZone(window_start, 'America/New_York')) >= toDate('2026-06-01')\n      AND toDate(toTimeZone(window_start, 'America/New_York')) <= toDate('2026-06-30')\n    GROUP BY ticker, session_date\n)\nSELECT ticker,\n       count() AS sessions_with_data,\n       round(quantileDeterministic(0.5)(bars, cityHash64(session_date)), 0) AS median_bars_per_session,\n       min(bars) AS quietest_session_bars\nFROM daily\nGROUP BY ticker\nORDER BY median_bars_per_session DESC","computed_at":"2026-08-01T08:37:24.561231+00:00","elapsed":0.00236824}