SPY Options History — September 2025

In September 2025, SPY traded between $639.61 and $666.97. ATM implied volatility averaged 12.8%, placing in the 8.4% IV rank vs the trailing year. The 30-day expected move averaged 3.7%. IV traded above realized volatility by 4.1% (HV 20d: 8.6%). Max pain ranged from $625.00 to $650.00. Net GEX was positive for 15 of 21 trading days. Term structure was in contango for 20 of 21 days. Put/call ratio averaged 1.21.

Notable Days

  • 2025-09-18: Highest Volume — 10,439,598 contracts
  • 2025-09-26: Largest IV drop — 8.4% change
  • 2025-09-25: Highest IV Rank — 11.9%
  • 2025-09-02: Largest Expected Move — 4.2%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$656.47$639.61$666.97$639.61$665.25
Max Pain$643.05$625.00$650.00$625.00$650.00
ATM IV12.8%11.7%14.0%13.8%13.2%
Expected Move3.7%3.4%4.2%4.2%3.6%
HV 20d8.6%6.7%9.7%9.5%6.7%
HV 60d9.4%8.6%10.1%10.1%8.6%
IV Rank8.4%5.5%11.9%11.3%9.7%
IV Percentile26.3%9.1%48.0%40.5%33.3%
Term Structure0.3%-0.0%0.7%-0.0%0.2%
VWIV15.1%13.8%17.6%17.6%14.2%
Skew 25d4.5%3.8%6.2%6.2%4.9%
Skew 10d9.8%7.7%12.0%12.0%9.8%
Call IV 25d11.0%10.3%11.9%11.6%11.2%
Put IV 25d15.5%14.2%17.7%17.7%16.0%
Bid-Ask Spread %2.201.642.762.062.42
Gamma HHI0.040.020.080.030.03
Net GEX1.68B-11.86B10.86B-11.86B4.66B
Net DEX-75.46B-130.47B-17.31B-17.31B-77.86B
Net VEX-800.7M-854.0M-763.0M-822.3M-805.3M
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio1.210.731.691.021.28
Total Volume7,734,769.1436,330,42410,439,5987,550,8798,072,318
Total OI17,977,389.76215,626,01920,071,21317,050,23717,181,715

Daily Data (21 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call WallPut WallCall VolPut VolCall OIPut OI
2025-09-02$639.61$625.0013.8%4.2%9.5%11.3%17.6%6.2%-0.0%-11.86B-17.31B-822.3M1.022.06N/AN/A3,742,2673,808,6124,878,15612,172,081
2025-09-03$642.31$625.0013.2%3.9%9.5%9.8%16.0%5.7%0.1%-3.04B-40.36B-821.1M1.002.19N/AN/A3,822,9733,805,8474,992,61512,304,116
2025-09-04$648.13$635.0012.3%3.6%9.7%7.2%15.2%5.0%0.2%5.16B-73.91B-798.1M1.301.69N/AN/A3,045,5013,971,8135,021,30012,525,502
2025-09-05$646.68$638.0012.0%3.6%9.7%6.5%14.5%5.0%0.2%-2.03B-60.32B-805.3M1.001.66N/AN/A4,721,8924,720,5065,157,19212,966,602
2025-09-08$648.35$640.0012.1%3.6%9.4%6.7%15.1%4.6%0.3%2.77B-65.19B-787.8M1.061.64N/AN/A3,352,2063,567,9095,132,35412,684,438
2025-09-09$649.92$640.0012.0%3.5%9.3%6.2%15.1%4.8%0.3%5.39B-75.83B-785.7M1.342.27N/AN/A2,819,8083,779,6765,203,19312,822,476
2025-09-10$651.73$640.0012.0%3.5%8.8%6.4%14.9%4.6%0.3%2.79B-81.31B-787.0M1.182.23N/AN/A3,532,1684,157,1005,199,48313,183,052
2025-09-11$657.93$640.0011.7%3.4%9.3%5.5%14.6%3.8%0.3%10.49B-117.82B-763.0M1.692.56N/AN/A3,016,9315,101,9115,298,92313,386,766
2025-09-12$657.86$644.0011.7%3.4%9.3%5.5%14.2%3.8%0.4%1.76B-105.03B-786.9M1.392.21N/AN/A2,729,9393,805,5445,368,80314,299,642
2025-09-15$660.19$645.0012.4%3.6%9.3%7.4%15.5%4.2%0.1%10.07B-110.74B-764.3M1.222.20N/AN/A2,976,2183,623,4785,243,00814,043,396
2025-09-16$660.23$645.0012.9%3.7%9.3%8.9%14.8%4.3%0.1%885.1M-106.08B-779.9M1.012.16N/AN/A3,147,4663,182,9585,394,40514,174,799
2025-09-17$659.02$645.0012.6%3.6%8.9%8.1%14.9%4.2%0.1%3.83B-106.94B-773.3M1.202.76N/AN/A3,432,9544,129,6595,597,23514,308,896
2025-09-18$662.36$645.0012.5%3.6%8.9%7.8%15.1%4.0%0.2%10.86B-130.47B-768.5M0.732.13N/AN/A6,034,3114,405,2875,658,37514,412,838
2025-09-19$663.58$647.0012.6%3.6%8.5%8.0%14.8%4.0%0.2%7.77B-76.40B-790.7M1.292.14N/AN/A3,102,1954,015,0644,848,65914,558,420
2025-09-22$666.97$650.0013.0%3.7%7.1%9.2%15.9%4.3%0.5%6.55B-84.80B-795.6M1.542.07N/AN/A2,889,2224,439,2104,335,27011,290,749
2025-09-23$663.09$650.0013.9%3.9%7.4%11.5%16.3%4.5%0.5%-6.55B-54.24B-845.5M1.232.20N/AN/A3,730,6394,601,3724,472,37311,939,140
2025-09-24$660.50$650.0013.7%3.9%7.7%11.0%15.3%4.4%0.5%-8.20B-41.62B-845.0M1.292.29N/AN/A3,447,8144,458,4104,666,83212,073,034
2025-09-25$657.30$650.0014.0%3.9%7.9%11.9%15.8%4.8%0.5%-11.55B-25.98B-854.0M1.362.48N/AN/A4,000,8335,422,3864,758,59412,125,221
2025-09-26$661.46$650.0012.8%3.5%8.1%8.7%14.3%4.4%0.7%1.73B-62.38B-822.7M1.152.39N/AN/A3,767,8944,326,8494,849,12812,208,439
2025-09-29$663.33$650.0013.2%3.6%7.5%9.7%13.8%4.4%0.2%3.71B-70.03B-811.7M1.182.44N/AN/A3,536,0864,184,9264,708,27412,079,691
2025-09-30$665.25$650.0013.2%3.6%6.7%9.7%14.2%4.9%0.2%4.66B-77.86B-805.3M1.282.42N/AN/A3,533,9374,538,3814,787,09012,394,625