SPX sessions closed in positive gamma, with the net-gamma percentile 80 and above

269 sessions · the archive filtered by the dealer book · all sessions · the calendar

269 of 1,122 sessions match. Of them 100% closed above the flip (archive 56%) and the mean open-to-close move was 0.61% (archive 0.59%).

Every row is a finished SPX session and links to its page, where the same numbers stand with the day's events and a free minute-by-minute replay. The filters are the closing measurements those pages print: the zero-gamma flip against the close and the open, the net-gamma percentile, how often the flip was crossed, and the calendar event the day carried. The shares above are counts over the matched days next to the same counts over the whole archive; a share that matches the archive is a base rate, not a pattern.

SessionCloseMoveFlipvs flipPctlCrossEvents
2026-09-257,743.35+0.42%7,731.3+12.0808Housing, UMich
2026-09-247,704.75+0.46%7,693.4+11.41005Housing, Claims, EIA, Auctions
2026-09-187,648.15+0.09%7,630.0+18.19522Opex
2026-09-177,637.80-0.04%7,634.0+3.99014Housing, Claims, EIA, Auctions
2026-08-317,685.95-0.06%7,677.5+8.58040Opex
2026-08-277,731.24+0.35%7,718.8+12.410016Claims, EIA, Auctions
2026-08-257,677.27-0.03%7,669.0+8.39523Housing, Confidence, Auctions
2026-08-137,798.82+0.41%7,792.0+6.9904PPI, Claims, EIA, Auctions
2026-08-077,758.52+0.33%7,744.6+13.99020NFP
2026-07-317,489.97+0.23%7,467.1+22.98512UMich
2026-07-307,437.15+0.79%7,413.9+23.2806PCE, GDP, Claims, EIA
2026-07-217,509.67+0.37%7,502.2+7.41008
2026-07-157,572.15+0.02%7,560.4+11.88022PPI, VIX settlement, EIA, Fed
2026-07-107,575.01+0.33%7,556.6+18.4958
2026-07-087,482.92+0.34%7,466.2+16.7909VIX settlement, EIA, Auctions
2026-07-067,537.25+0.25%7,532.1+5.1802ISM
2026-06-307,498.14+0.77%7,482.5+15.7900Confidence, JOLTS
2026-06-297,440.62+0.69%7,414.4+26.2955
2026-06-117,393.92+1.35%7,327.1+66.88034PPI, Claims, EIA, Fed, Auctions
2026-06-017,599.70+0.45%7,585.6+14.19519ISM, Housing
2026-05-267,519.02+0.03%7,513.4+5.68517Confidence, Auctions
2026-05-217,445.56+0.62%7,423.2+22.48519Housing, Claims, EIA
2026-05-187,402.12-0.19%7,387.9+14.2808
2026-05-127,400.75+0.18%7,372.9+27.9857CPI, Auctions
2026-05-067,365.20+0.85%7,334.9+30.3950VIX settlement, EIA
2026-04-247,164.55+0.53%7,149.3+15.39511UMich
2026-04-207,109.05-0.06%7,103.3+5.78522
2026-04-167,041.02+0.13%7,030.2+10.9958Claims, EIA
2026-04-157,023.14+0.66%6,992.3+30.9850VIX settlement, EIA, Fed
2026-04-146,966.67+0.92%6,943.7+23.0950PPI
2026-04-096,825.15+0.81%6,808.5+16.71008PCE, GDP, Claims, EIA, Auctions
2026-04-086,782.20-0.06%6,771.5+10.78514VIX settlement, EIA, Auctions
2026-04-076,617.42+0.42%6,573.9+43.6805Housing, Auctions
2026-04-066,611.25+0.33%6,601.0+10.29022ISM
2026-04-026,582.42+1.39%6,562.2+20.2857Claims, EIA
2026-03-316,528.50+1.69%6,463.2+65.3956Confidence, JOLTS
2026-03-116,775.15-0.24%6,767.3+7.810026CPI, VIX settlement, EIA, Auctions
2026-03-056,830.87-0.12%6,807.1+23.78510Claims, EIA
2026-02-276,879.27+0.43%6,859.8+19.59510PPI, Housing, Opex
2026-02-256,946.55+0.31%6,935.9+10.7850VIX settlement, EIA, Auctions
2026-02-206,909.09+1.06%6,895.8+13.31006PCE, GDP, UMich, Housing, Opex
2026-02-176,843.76+0.29%6,838.7+5.18018
2026-02-066,931.92+1.36%6,903.0+28.91000UMich
2026-01-306,938.85-0.19%6,933.0+5.98022PPI
2026-01-296,967.37-0.31%6,934.3+33.19010Housing, Claims, EIA, Auctions
2025-12-266,929.70-0.03%6,929.6+0.19428UMich, EIA
2025-12-246,932.00+0.35%6,916.6+15.4950Claims, VIX settlement, EIA, Auctions
2025-12-236,909.75+0.42%6,893.2+16.51004PCE, Housing, GDP, Auctions
2025-12-166,800.12-0.13%6,789.6+10.59520NFP, Retail sales
2025-12-116,900.94+0.63%6,878.9+22.01009Claims, EIA, Auctions
2025-12-046,855.99-0.10%6,846.3+9.610030Housing, Claims, EIA
2025-11-286,848.69+0.04%6,832.4+16.31001UMich, EIA, Opex
2025-11-256,766.32+1.03%6,737.6+28.81007PPI, Retail sales, Confidence, Auctions
2025-11-246,705.67+0.92%6,693.9+11.8800Auctions
2025-11-106,832.77+0.54%6,807.5+25.3802Auctions
2025-11-076,728.72+0.64%6,684.0+44.8907
2025-10-276,875.15+0.36%6,857.1+18.0950Auctions
2025-10-136,654.67+0.38%6,649.3+5.49512
2025-10-096,734.67-0.35%6,729.0+5.71006Fed, EIA, Auctions
2025-09-226,694.80+0.68%6,674.9+19.9800
2025-09-196,664.50+0.30%6,650.3+14.3909Opex
2025-09-156,615.70+0.12%6,609.3+6.49026
2025-09-096,513.07+0.23%6,501.7+11.38520Auctions
2025-09-026,415.17+0.60%6,389.6+25.6905ISM, Housing
2025-08-186,449.72+0.03%6,445.7+4.010048
2025-08-126,446.00+0.69%6,421.8+24.2856CPI
2025-08-086,389.30+0.41%6,381.7+7.6902UMich
2025-08-066,344.97+0.63%6,335.0+10.0857VIX settlement, EIA, Auctions
2025-08-046,329.57+0.78%6,315.1+14.51000Housing, Fed
2025-07-286,389.72-0.11%6,386.4+3.410028Auctions, Refunding
2025-07-256,389.17+0.28%6,384.8+4.4952Housing, UMich
2025-07-226,310.50+0.07%6,302.6+7.99525Fed
2025-07-106,279.57+0.26%6,273.7+5.9846Claims, EIA, Auctions
2025-06-266,141.37+0.44%6,130.0+11.4802Housing, GDP, Claims, EIA, Auctions
2025-06-236,025.42+0.98%5,992.1+33.310013
2025-06-126,044.70+0.55%6,035.2+9.51007PPI, Claims, EIA, Fed, Auctions
2025-06-106,038.80+0.40%6,023.4+15.41004Auctions
2025-06-025,935.80+0.69%5,906.6+29.21002ISM, Housing, Fed
2025-05-305,909.25+0.27%5,886.8+22.58019PCE, Opex
2025-05-275,921.17+0.80%5,906.7+14.4954Housing, Confidence, Auctions
2025-05-195,963.97+1.04%5,945.8+18.2950
2025-05-165,958.37+0.64%5,932.1+26.3953Housing, Opex
2025-05-155,915.25+0.76%5,900.6+14.6907PPI, Retail sales, Claims, Fed, EIA
2025-04-305,563.40+1.58%5,500.0+63.4854PCE, GDP, Refunding, VIX settlement, EIA
2025-04-255,525.34+0.71%5,502.6+22.810016Retail sales, UMich
2025-04-245,484.65+1.96%5,455.5+29.2950Housing, Claims, EIA, Auctions
2025-04-215,159.90-1.34%5,132.5+27.4954
2025-04-015,632.60+0.78%5,607.7+24.9856ISM, JOLTS, Housing
2025-03-315,611.40+1.61%5,564.9+46.5805
2025-03-255,776.52-0.02%5,768.5+8.08030Housing, Confidence, Auctions
2025-03-245,766.87+0.72%5,751.9+15.01004
2025-03-215,667.20+0.83%5,639.9+27.39518Opex
2025-03-145,638.54+1.23%5,617.1+21.4854UMich
2025-02-196,144.07+0.47%6,127.6+16.5956Housing, VIX settlement, Auctions
2025-02-186,128.22+0.08%6,113.2+15.09031
2025-02-136,115.14+0.86%6,079.8+35.41002PPI, Claims, EIA, Auctions
2025-02-056,061.34+0.59%6,040.2+21.1958Refunding, VIX settlement, ISM, EIA, Fed
2025-01-286,067.06+0.70%6,047.7+19.3806Housing, Confidence, Auctions
2025-01-236,117.70+0.64%6,093.9+23.8890Claims, EIA
2025-01-216,048.81+0.35%6,035.1+13.8892
2025-01-155,950.07+0.50%5,941.0+9.0956CPI, VIX settlement, EIA, Fed
2025-01-135,835.15+0.95%5,809.9+25.29519
2024-12-246,037.27+0.92%6,006.1+31.2950VIX settlement, Auctions
2024-12-176,050.05+0.07%6,046.5+3.610013Retail sales, Auctions
2024-12-066,089.35+0.05%6,086.8+2.58414NFP
2024-12-046,086.15+0.32%6,073.4+12.7896Housing, VIX settlement, ISM, EIA
2024-12-036,049.62+0.09%6,043.6+6.110014JOLTS
2024-11-296,035.72+0.51%6,027.1+8.61000EIA, Opex
2024-11-266,021.37+0.34%6,007.9+13.59512Housing, Confidence, Auctions
2024-11-225,969.55+0.28%5,961.7+7.910020UMich
2024-11-195,916.82+0.95%5,901.4+15.4852Housing
2024-11-116,002.05-0.24%6,000.2+1.98024Fed
2024-11-075,974.00+0.39%5,965.0+9.0850Claims, EIA, FOMC
2024-11-065,929.60+0.55%5,910.0+19.610010VIX settlement, EIA, Auctions
2024-11-055,782.72+0.96%5,764.1+18.61000ISM, Auctions
2024-10-095,793.82+0.81%5,773.6+20.2801VIX settlement, EIA, Auctions
2024-10-045,750.30+0.18%5,725.2+25.110022NFP
2024-10-035,700.27+0.06%5,692.4+7.910020Housing, Claims, ISM, EIA
2024-09-245,734.45+0.20%5,722.7+11.81002Confidence
2024-09-125,594.92+0.76%5,573.5+21.48010PPI, Claims, EIA, Fed, Auctions
2024-09-095,470.59+0.35%5,460.3+10.3908
2024-08-305,650.20+0.57%5,609.7+40.6856PCE, Opex
2024-08-235,634.17+0.54%5,616.6+17.69512Housing, UMich
2024-08-155,541.77+0.54%5,526.1+15.6800Retail sales, Claims, EIA
2024-08-145,455.06+0.19%5,443.1+11.91004CPI, VIX settlement, EIA
2024-08-135,434.52+0.99%5,409.3+25.3950PPI
2024-08-095,345.15+0.61%5,331.9+13.210016UMich
2024-08-085,321.16+1.23%5,301.0+20.1950Claims, EIA, Auctions
2024-08-025,345.79-0.47%5,335.9+9.9805NFP, Housing
2024-07-035,534.72+0.42%5,516.7+18.11000Housing, Claims, VIX settlement, ISM, EIA
2024-07-015,474.70-0.02%5,466.5+8.28516ISM, Housing
2024-06-255,470.15+0.20%5,460.7+9.41004Confidence
2024-06-145,431.25+0.33%5,419.7+11.5857UMich
2024-06-135,434.07-0.01%5,424.0+10.18514PPI, Claims, EIA, Auctions
2024-06-115,375.57+0.60%5,348.8+26.8902Auctions
2024-06-105,360.55+0.42%5,350.4+10.21002Auctions
2024-06-045,290.62+0.34%5,275.8+14.89522Housing, JOLTS
2024-05-245,304.00+0.34%5,301.1+2.98015Housing, UMich
2024-05-175,302.40+0.02%5,296.9+5.58034Opex
2024-05-155,308.82+0.72%5,290.2+18.6902CPI, Retail sales, VIX settlement, Fed, EIA
2024-05-145,247.92+0.43%5,231.9+16.08516Housing, PPI
2024-05-095,213.76+0.44%5,202.3+11.5952Claims, EIA, Auctions
2024-05-085,187.87+0.33%5,183.4+4.5808VIX settlement, EIA, Auctions
2024-05-065,180.35+0.61%5,162.7+17.71004Fed
2024-05-025,063.30+0.15%5,049.4+13.98518Housing, Claims, EIA
2024-04-255,048.87+0.82%5,029.2+19.69011GDP, Claims, EIA, Auctions
2024-04-245,072.77-0.13%5,068.2+4.68018Housing, VIX settlement, EIA, Auctions
2024-04-115,198.86+0.52%5,176.9+22.08510PPI, Claims, EIA, Auctions
2024-04-095,209.79-0.22%5,189.3+20.51009Auctions
2024-04-025,206.17+0.06%5,196.8+9.49513Housing, JOLTS
2024-03-195,177.35+0.75%5,161.9+15.4807Housing, Auctions
2024-03-125,175.49+0.65%5,160.7+14.8858CPI, Auctions
2024-02-285,070.22+0.11%5,068.0+2.29532GDP, EIA
2024-02-275,079.15+0.08%5,070.1+9.1908Housing, VIX settlement, Confidence, Auctions
2024-02-155,030.17+0.49%5,016.1+14.110011Retail sales, Claims, Fed, EIA
2024-02-145,001.10+0.39%4,977.6+23.59014PPI, VIX settlement, EIA
2024-02-074,994.87+0.35%4,989.1+5.8956VIX settlement, EIA, Auctions
2024-02-014,905.95+0.79%4,881.6+24.38510Claims, ISM, Housing, EIA
2024-01-254,894.47+0.18%4,884.0+10.58521Housing, GDP, Claims, EIA, Auctions
2024-01-234,864.55+0.16%4,854.2+10.3856
2024-01-184,781.45+0.53%4,760.9+20.58019Housing, Claims, EIA
2024-01-174,739.26+0.12%4,730.5+8.79031Retail sales, VIX settlement, Auctions
2024-01-164,765.57-0.11%4,761.4+4.28512
2024-01-114,780.09-0.29%4,767.8+12.31006CPI, Claims, EIA, Auctions
2024-01-104,782.60+0.47%4,768.9+13.7954NFP, VIX settlement, EIA, Auctions
2024-01-094,755.17+0.41%4,749.9+5.310011Auctions
2023-12-274,781.84+0.16%4,774.7+7.18032VIX settlement, Auctions
2023-12-084,604.24+0.52%4,595.3+9.09512NFP, UMich
2023-12-074,585.47+0.30%4,583.1+2.3847Claims, EIA, Fed
2023-12-044,570.02+0.21%4,563.0+7.110035Housing
2023-12-014,593.65+0.76%4,583.5+10.1845ISM, Housing
2023-11-284,554.30+0.19%4,552.0+2.310025Confidence, Auctions
2023-11-214,538.99+0.04%4,535.7+3.38524
2023-11-174,513.91+0.09%4,511.5+2.48524GDP, Housing, Opex
2023-11-104,416.12+1.16%4,380.9+35.31008UMich
2023-11-064,367.12-0.11%4,359.4+7.79030Fed
2023-10-244,249.12+0.18%4,242.7+6.4909
2023-10-094,335.17+1.07%4,309.3+25.910012
2023-10-054,258.45+0.01%4,250.8+7.68012Claims, EIA
2023-10-044,263.76+0.57%4,243.4+20.49528Housing, VIX settlement, ISM, EIA
2023-09-274,274.12-0.34%4,269.4+4.78013Housing, VIX settlement, EIA, Auctions
2023-09-254,337.40+0.65%4,326.0+11.48016
2023-09-194,444.30+0.02%4,437.1+7.2956Housing, Auctions
2023-09-144,505.61+0.38%4,500.1+5.5808PPI, Retail sales, Claims, EIA
2023-09-064,465.57-0.42%4,463.6+1.98019VIX settlement, ISM
2023-09-014,514.42-0.48%4,512.8+1.68016NFP, ISM, Housing
2023-08-284,434.07+0.15%4,424.8+9.38514Auctions
2023-08-214,400.05+0.43%4,386.2+13.810010
2023-08-184,369.62+0.62%4,363.5+6.18027Opex
2023-08-144,489.55+0.73%4,476.3+13.3957
2023-08-084,500.24+0.17%4,483.2+17.010010
2023-07-184,555.75+0.89%4,539.2+16.5841Retail sales
2023-07-134,510.70+0.49%4,501.3+9.4847PPI, Claims, EIA, Auctions
2023-07-114,439.90+0.50%4,420.0+19.91008
2023-07-104,409.02+0.17%4,401.7+7.39518
2023-07-034,454.89+0.27%4,448.9+6.01001ISM, Housing
2023-06-304,450.05+0.51%4,443.3+6.7800PCE
2023-06-224,381.66+0.62%4,369.5+12.18015Claims, EIA
2023-06-134,369.47+0.30%4,363.7+5.8907CPI, Auctions
2023-06-124,339.74+0.69%4,317.2+22.69030Auctions

Showing the first 200 of 269; the JSON carries all of them.

Turn a filter into a rule

A count is where a question starts. The Lab takes a rule in plain words ("sell the 0DTE straddle at 10:00 on days that opened below the flip with the percentile under 20"), compiles it against every archived session and reports the out-of-sample verdict with day-clustered intervals. An assistant with the MCP server can page through the same archive with list_sessions and get_session.

Measurements are model output derived from public trade and quote data; they are approximations and can be wrong. Nothing here is investment advice; see the Terms.