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S&P 500 Price to Earnings Ratio

Written by:
PK

On this page you'll find the current S&P 500 price to earnings ratio, summary statistics on the maximum, minimum, average, and median P/E reading, and the history of the S&P 500 P/E ratio. Find a S&P 500 PE Ratio visualization and calculator, as well as the monthly P/E ratio history until today.

Looking for the inverse? Find the S&P 500 earnings yield tool.

S&P 500 Price to Earnings History Tool

Historical S&P 500 Price to Earnings Ratio

Below is the monthly history of the S&P 500 Price to Earning ratio. Use the S&P 500 Return Calculator to see details on the most recent data.

There's a lot of data here – use the accordion below to expand the section and reveal the P/E data.

Historical S&P 500 PE Ratio by Month

The index value is the average closing price in a given month, while the earnings are the trailing 12 month (TTM) earnings.

MonthIndex AverageEarnings/ShPrice/Earnings
01-18714.44$0.4011.1
02-18714.50$0.4011.25
03-18714.61$0.4011.53
04-18714.74$0.4011.85
05-18714.86$0.4012.15
06-18714.82$0.4012.05
07-18714.73$0.4011.83
08-18714.79$0.4011.98
09-18714.84$0.4012.1
10-18714.59$0.4011.48
11-18714.64$0.4011.6
12-18714.74$0.4011.85
01-18724.86$0.4012.07
02-18724.88$0.4112.05
03-18725.04$0.4112.37
04-18725.18$0.4112.63
05-18725.18$0.4112.56
06-18725.13$0.4212.36
07-18725.10$0.4212.22
08-18725.04$0.4212
09-18724.95$0.4211.72
10-18724.97$0.4311.69
11-18724.95$0.4311.58
12-18725.07$0.4311.79
01-18735.11$0.4311.82
02-18735.15$0.4411.84
03-18735.11$0.4411.68
04-18735.04$0.4411.45
05-18735.05$0.4411.41
06-18734.98$0.4511.19
07-18734.97$0.4511.11
08-18734.97$0.4511.04
09-18734.59$0.4510.14
10-18734.19$0.469.21
11-18734.04$0.468.83
12-18734.42$0.469.61
01-18744.66$0.4610.13
02-18744.80$0.4610.43
03-18744.73$0.4610.28
04-18744.60$0.4610
05-18744.48$0.469.74
06-18744.46$0.469.7
07-18744.46$0.469.7
08-18744.47$0.469.72
09-18744.54$0.469.87
10-18744.53$0.469.85
11-18744.57$0.469.93
12-18744.54$0.469.87
01-18754.54$0.4510.05
02-18754.53$0.4410.22
03-18754.59$0.4410.55
04-18754.65$0.4310.9
05-18754.47$0.4210.69
06-18754.38$0.4110.68
07-18754.39$0.4010.93
08-18754.41$0.3911.21
09-18754.37$0.3911.35
10-18754.30$0.3811.41
11-18754.37$0.3711.87
12-18754.37$0.3612.14
01-18764.46$0.3512.62
02-18764.52$0.3513.04
03-18764.51$0.3413.26
04-18764.34$0.3313.02
05-18764.18$0.3312.79
06-18764.15$0.3212.97
07-18764.10$0.3113.09
08-18763.93$0.3112.81
09-18763.69$0.3012.3
10-18763.67$0.2912.51
11-18763.60$0.2912.56
12-18763.58$0.2812.79
01-18773.55$0.2812.6
02-18773.34$0.2811.79
03-18773.17$0.2911.12
04-18772.94$0.2910.25
05-18772.94$0.2910.2
06-18772.73$0.299.41
07-18772.85$0.299.77
08-18773.05$0.2910.4
09-18773.24$0.3010.98
10-18773.31$0.3011.16
11-18773.26$0.3010.93
12-18773.25$0.3010.83
01-18783.25$0.3010.8
02-18783.18$0.3010.54
03-18783.24$0.3010.71
04-18783.33$0.3010.98
05-18783.34$0.3010.98
06-18783.41$0.3111.18
07-18783.48$0.3111.38
08-18783.45$0.3111.25
09-18783.52$0.3111.45
10-18783.48$0.3111.29
11-18783.47$0.3111.22
12-18783.45$0.3111.13
01-18793.58$0.3211.34
02-18793.71$0.3211.53
03-18793.65$0.3311.15
04-18793.77$0.3311.31
05-18793.94$0.3411.62
06-18793.96$0.3511.48
07-18794.04$0.3511.52
08-18794.07$0.3611.41
09-18794.22$0.3611.64
10-18794.68$0.3712.71
11-18794.93$0.3713.17
12-18794.92$0.3812.95
01-18805.11$0.3913.13
02-18805.20$0.4013.06
03-18805.30$0.4113.01
04-18805.18$0.4212.43
05-18804.77$0.4311.2
06-18804.79$0.4411.01
07-18805.01$0.4411.28
08-18805.19$0.4511.45
09-18805.18$0.4611.2
10-18805.33$0.4711.3
11-18805.61$0.4811.67
12-18805.84$0.4911.92
01-18816.19$0.4912.74
02-18816.17$0.4812.81
03-18816.24$0.4813.07
04-18816.22$0.4713.14
05-18816.50$0.4713.85
06-18816.58$0.4714.15
07-18816.35$0.4613.78
08-18816.20$0.4613.58
09-18816.25$0.4513.81
10-18816.15$0.4513.72
11-18816.19$0.4413.94
12-18816.01$0.4413.66
01-18825.92$0.4413.48
02-18825.79$0.4413.21
03-18825.78$0.4413.21
04-18825.78$0.4413.24
05-18825.71$0.4413.1
06-18825.68$0.4413.06
07-18826.00$0.4313.82
08-18826.18$0.4314.26
09-18826.24$0.4314.43
10-18826.07$0.4314.06
11-18825.81$0.4313.49
12-18825.84$0.4313.58
01-18835.81$0.4313.59
02-18835.68$0.4313.36
03-18835.75$0.4213.61
04-18835.87$0.4213.98
05-18835.77$0.4213.82
06-18835.82$0.4214.02
07-18835.73$0.4113.89
08-18835.47$0.4113.34
09-18835.53$0.4113.57
10-18835.38$0.4113.28
11-18835.46$0.4013.57
12-18835.34$0.4013.35
01-18845.18$0.3913.2
02-18845.32$0.3913.82
03-18845.30$0.3814.04
04-18845.06$0.3713.68
05-18844.65$0.3612.83
06-18844.46$0.3612.56
07-18844.46$0.3512.83
08-18844.74$0.3413.94
09-18844.59$0.3313.8
10-18844.44$0.3313.66
11-18844.35$0.3213.7
12-18844.34$0.3114
01-18854.24$0.3113.82
02-18854.37$0.3014.41
03-18854.38$0.3014.6
04-18854.37$0.3014.73
05-18854.32$0.2914.73
06-18854.30$0.2914.83
07-18854.46$0.2915.56
08-18854.71$0.2816.63
09-18854.65$0.2816.61
10-18854.92$0.2817.78
11-18855.24$0.2719.17
12-18855.20$0.2719.26
01-18865.20$0.2818.91
02-18865.30$0.2818.93
03-18865.19$0.2918.21
04-18865.12$0.2917.66
05-18865.02$0.3017.02
06-18865.25$0.3017.5
07-18865.33$0.3117.48
08-18865.37$0.3117.32
09-18865.51$0.3217.49
10-18865.65$0.3217.66
11-18865.79$0.3317.82
12-18865.64$0.3317.09
01-18875.58$0.3316.78
02-18875.54$0.3416.54
03-18875.67$0.3416.8
04-18875.80$0.3417.06
05-18875.90$0.3417.23
06-18875.73$0.3516.61
07-18875.59$0.3516.09
08-18875.45$0.3515.57
09-18875.38$0.3515.26
10-18875.20$0.3614.65
11-18875.30$0.3614.83
12-18875.27$0.3614.64
01-18885.31$0.3515.1
02-18885.28$0.3415.38
03-18885.08$0.3415.16
04-18885.10$0.3315.61
05-18885.17$0.3216.24
06-18885.01$0.3116.16
07-18885.14$0.3017.04
08-18885.25$0.2917.9
09-18885.38$0.2918.88
10-18885.35$0.2819.34
11-18885.24$0.2719.53
12-18885.14$0.2619.77
01-18895.24$0.2619.9
02-18895.30$0.2719.87
03-18895.19$0.2719.22
04-18895.18$0.2718.95
05-18895.32$0.2819.23
06-18895.41$0.2819.32
07-18895.30$0.2818.71
08-18895.37$0.2918.73
09-18895.50$0.2918.97
10-18895.40$0.2918.41
11-18895.35$0.3018.03
12-18895.32$0.3017.73
01-18905.38$0.3017.98
02-18905.32$0.3017.83
03-18905.28$0.3017.75
04-18905.39$0.3018.17
05-18905.62$0.3019
06-18905.58$0.3018.92
07-18905.54$0.2918.83
08-18905.41$0.2918.45
09-18905.32$0.2918.19
10-18905.08$0.2917.42
11-18904.71$0.2916.2
12-18904.60$0.2915.86
01-18914.84$0.2916.45
02-18914.90$0.3016.43
03-18914.81$0.3015.9
04-18914.97$0.3116.2
05-18914.95$0.3115.93
06-18914.85$0.3215.4
07-18914.77$0.3214.94
08-18914.93$0.3215.25
09-18915.33$0.3316.27
10-18915.33$0.3316.07
11-18915.25$0.3415.63
12-18915.41$0.3415.91
01-18925.51$0.3416.09
02-18925.52$0.3516
03-18925.58$0.3516.06
04-18925.57$0.3515.91
05-18925.57$0.3515.8
06-18925.54$0.3615.61
07-18925.54$0.3615.5
08-18925.62$0.3615.61
09-18925.48$0.3615.12
10-18925.59$0.3715.32
11-18925.57$0.3715.16
12-18925.51$0.3714.89
01-18935.61$0.3615.55
02-18935.51$0.3515.67
03-18935.31$0.3415.5
04-18935.31$0.3315.93
05-18934.84$0.3214.93
06-18934.61$0.3214.63
07-18934.18$0.3113.67
08-18934.08$0.3013.75
09-18934.37$0.2915.2
10-18934.50$0.2816.17
11-18934.57$0.2716.98
12-18934.41$0.2616.96
01-18944.32$0.2517.16
02-18944.38$0.2418
03-18944.51$0.2419.19
04-18944.57$0.2320.16
05-18944.40$0.2220.16
06-18944.34$0.2120.67
07-18944.25$0.2021.07
08-18944.41$0.1922.81
09-18944.48$0.1924.22
10-18944.34$0.1824.56
11-18944.34$0.1725.79
12-18944.30$0.1626.88
01-18954.25$0.1725.37
02-18954.19$0.1823.94
03-18954.19$0.1822.96
04-18954.37$0.1923
05-18954.61$0.2023.34
06-18954.70$0.2122.93
07-18954.72$0.2122.21
08-18954.79$0.2221.77
09-18954.82$0.2321.19
10-18954.75$0.2420.21
11-18954.59$0.2418.93
12-18954.32$0.2517.28
01-18964.27$0.2517.31
02-18964.45$0.2418.29
03-18964.38$0.2418.25
04-18964.42$0.2418.67
05-18964.40$0.2318.86
06-18964.32$0.2318.78
07-18964.04$0.2317.82
08-18963.81$0.2217.06
09-18964.01$0.2218.23
10-18964.10$0.2218.92
11-18964.38$0.2120.53
12-18964.22$0.2120.1
01-18974.22$0.2219.33
02-18974.18$0.2318.44
03-18974.19$0.2417.83
04-18974.06$0.2416.69
05-18974.08$0.2516.21
06-18974.27$0.2616.42
07-18974.46$0.2716.62
08-18974.75$0.2817.17
09-18974.98$0.2917.47
10-18974.82$0.2916.43
11-18974.65$0.3015.41
12-18974.75$0.3115.32
01-18984.88$0.3115.58
02-18984.87$0.3215.38
03-18984.65$0.3214.53
04-18984.57$0.3214.14
05-18984.87$0.3314.91
06-18985.06$0.3315.33
07-18985.08$0.3315.24
08-18985.27$0.3415.65
09-18985.26$0.3415.47
10-18985.15$0.3415
11-18985.32$0.3515.34
12-18985.65$0.3516.14
01-18996.08$0.3616.85
02-18996.31$0.3716.98
03-18996.40$0.3816.73
04-18996.48$0.3916.48
05-18996.21$0.4015.36
06-18996.07$0.4214.63
07-18996.28$0.4314.75
08-18996.44$0.4414.75
09-18996.37$0.4514.23
10-18996.34$0.4613.83
11-18996.46$0.4713.77
12-18996.02$0.4812.54
01-19006.10$0.4812.71
02-19006.21$0.4812.94
03-19006.26$0.4813.04
04-19006.34$0.4813.21
05-19006.04$0.4812.58
06-19005.86$0.4812.21
07-19005.86$0.4812.21
08-19005.94$0.4812.38
09-19005.80$0.4812.08
10-19006.01$0.4812.52
11-19006.48$0.4813.5
12-19006.87$0.4814.31
01-19017.07$0.4814.68
02-19017.25$0.4815
03-19017.51$0.4915.48
04-19018.14$0.4916.72
05-19017.73$0.4915.83
06-19018.50$0.4917.35
07-19017.93$0.4916.13
08-19018.04$0.4916.3
09-19018.00$0.5016.16
10-19017.91$0.5015.93
11-19018.08$0.5016.22
12-19017.95$0.5015.9
01-19028.12$0.5115.9
02-19028.19$0.5215.7
03-19028.20$0.5315.4
04-19028.48$0.5415.61
05-19028.46$0.5515.27
06-19028.41$0.5714.88
07-19028.60$0.5814.94
08-19028.83$0.5915.05
09-19028.85$0.6014.81
10-19028.57$0.6114.09
11-19028.24$0.6213.31
12-19028.05$0.6312.78
01-19038.46$0.6213.61
02-19038.41$0.6113.71
03-19038.08$0.6113.36
04-19037.75$0.6012.99
05-19037.60$0.5912.92
06-19037.18$0.5812.38
07-19036.85$0.5711.98
08-19036.63$0.5611.77
09-19036.47$0.5611.66
10-19036.26$0.5511.45
11-19036.28$0.5411.67
12-19036.57$0.5312.4
01-19046.68$0.5312.68
02-19046.50$0.5212.42
03-19046.48$0.5212.46
04-19046.64$0.5212.85
05-19046.50$0.5112.66
06-19046.51$0.5112.76
07-19046.78$0.5113.38
08-19047.01$0.5013.93
09-19047.32$0.5014.64
10-19047.75$0.5015.6
11-19048.17$0.4916.56
12-19048.25$0.4916.84
01-19058.43$0.5116.69
02-19058.80$0.5216.92
03-19059.05$0.5416.92
04-19058.94$0.5516.25
05-19058.50$0.5715.04
06-19058.60$0.5814.83
07-19058.87$0.6014.91
08-19059.20$0.6115.08
09-19059.23$0.6314.77
10-19059.36$0.6414.63
11-19059.31$0.6614.21
12-19059.54$0.6714.24
01-19069.87$0.6814.57
02-19069.80$0.6914.31
03-19069.56$0.6913.81
04-19069.43$0.7013.47
05-19069.18$0.7112.98
06-19069.30$0.7213.01
07-19069.06$0.7212.54
08-19069.73$0.7313.33
09-190610.03$0.7413.6
10-19069.73$0.7513.06
11-19069.93$0.7513.2
12-19069.84$0.7612.95
01-19079.56$0.7512.72
02-19079.26$0.7412.46
03-19078.35$0.7411.36
04-19078.39$0.7311.55
05-19078.10$0.7211.28
06-19077.84$0.7111.04
07-19078.14$0.7011.6
08-19077.53$0.6910.86
09-19077.45$0.6910.88
10-19076.64$0.689.81
11-19076.25$0.679.35
12-19076.57$0.669.95
01-19086.85$0.6510.49
02-19086.60$0.6510.21
03-19086.87$0.6410.73
04-19087.24$0.6311.43
05-19087.63$0.6312.17
06-19087.64$0.6212.32
07-19087.92$0.6112.91
08-19088.26$0.6113.61
09-19088.17$0.6013.62
10-19088.27$0.5913.94
11-19088.83$0.5915.05
12-19089.03$0.5815.57
01-19099.06$0.6015.23
02-19098.80$0.6114.43
03-19098.92$0.6314.27
04-19099.32$0.6414.56
05-19099.63$0.6614.7
06-19099.80$0.6714.63
07-19099.94$0.6914.51
08-190910.18$0.7014.54
09-190910.19$0.7214.25
10-190910.23$0.7314.01
11-190910.18$0.7513.66
12-190910.30$0.7613.55
01-191010.08$0.7613.31
02-19109.72$0.7612.87
03-19109.96$0.7513.24
04-19109.72$0.7512.96
05-19109.56$0.7512.79
06-19109.10$0.7512.21
07-19108.64$0.7411.64
08-19108.85$0.7411.96
09-19108.91$0.7412.08
10-19109.32$0.7412.68
11-19109.31$0.7312.71
12-19109.05$0.7312.4
01-19119.27$0.7212.91
02-19119.43$0.7113.34
03-19119.32$0.7013.41
04-19119.28$0.6813.58
05-19119.48$0.6714.11
06-19119.67$0.6614.65
07-19119.63$0.6514.85
08-19119.17$0.6414.4
09-19118.67$0.6313.87
10-19118.72$0.6114.22
11-19119.07$0.6015.07
12-19119.11$0.5915.44
01-19129.12$0.6015.22
02-19129.04$0.6114.86
03-19129.30$0.6215.06
04-19129.59$0.6315.3
05-19129.58$0.6415.07
06-19129.58$0.6514.85
07-19129.59$0.6514.66
08-19129.81$0.6614.79
09-19129.86$0.6714.66
10-19129.84$0.6814.43
11-19129.73$0.6914.09
12-19129.38$0.7013.4
01-19139.30$0.6913.4
02-19138.97$0.6913.03
03-19138.80$0.6812.89
04-19138.79$0.6812.99
05-19138.55$0.6712.75
06-19138.12$0.6712.21
07-19138.23$0.6612.48
08-19138.45$0.6512.93
09-19138.53$0.6513.17
10-19138.26$0.6412.87
11-19138.05$0.6412.66
12-19138.04$0.6312.76
01-19148.37$0.6213.48
02-19148.48$0.6113.86
03-19148.32$0.6013.81
04-19148.12$0.5913.69
05-19148.17$0.5813.98
06-19148.13$0.5814.14
07-19147.68$0.5713.57
08-19147.68$0.5613.8
09-19147.68$0.5514.03
10-19147.68$0.5414.27
11-19147.68$0.5314.51
12-19147.35$0.5214.13
01-19157.48$0.5513.6
02-19157.38$0.5812.72
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11-20051237.37$68.8117.98
12-20051262.07$69.9318.05
01-20061278.73$70.8418.05
02-20061276.65$71.7617.79
03-20061293.74$72.6717.8
04-20061302.17$73.2817.77
05-20061290.01$73.8817.46
06-20061253.17$74.4916.82
07-20061260.24$75.8516.61
08-20061287.15$77.2116.67
09-20061317.74$78.5716.77
10-20061363.38$79.5517.14
11-20061388.64$80.5317.24
12-20061416.42$81.5117.38
01-20071424.16$82.0617.36
02-20071444.80$82.6017.49
03-20071406.95$83.1516.92
04-20071463.64$83.7417.48
05-20071511.14$84.3317.92
06-20071514.19$84.9217.83
07-20071520.71$82.8118.36
08-20071454.62$80.7118.02
09-20071497.12$78.6019.05
10-20071539.66$74.4620.68
11-20071463.39$70.3220.81
12-20071479.22$66.1822.35
01-20081378.76$64.2521.46
02-20081354.87$62.3221.74
03-20081316.94$60.3921.81
04-20081370.47$57.3823.88
05-20081403.22$54.3825.81
06-20081341.25$51.3726.11
07-20081257.33$49.5625.37
08-20081281.47$47.7626.83
09-20081216.95$45.9526.48
10-2008968.80$35.5927.22
11-2008883.04$25.2434.99
12-2008877.56$14.8858.98
01-2009865.58$12.2170.91
02-2009805.23$9.5384.46
03-2009757.13$6.86110.37
04-2009848.15$7.08119.85
05-2009902.41$7.29123.73
06-2009926.12$7.51123.32
07-2009935.82$9.19101.87
08-20091009.73$10.8692.95
09-20091044.55$12.5483.3
10-20091067.66$25.3542.12
11-20091088.07$38.1628.51
12-20091110.38$50.9721.78
01-20101123.58$54.2920.7
02-20101089.16$57.6118.91
03-20101152.05$60.9318.91
04-20101197.32$62.9919.01
05-20101125.06$65.0417.3
06-20101083.36$67.1016.15
07-20101079.80$68.6915.72
08-20101087.28$70.2715.47
09-20101122.08$71.8615.61
10-20101171.58$73.6915.9
11-20101198.89$75.5215.88
12-20101241.53$77.3516.05
01-20111282.62$78.6716.3
02-20111321.12$79.9916.52
03-20111304.49$81.3116.04
04-20111331.51$82.1616.21
05-20111338.31$83.0216.12
06-20111287.29$83.8715.35
07-20111325.19$84.9115.61
08-20111185.31$85.9413.79
09-20111173.88$86.9813.5
10-20111207.22$86.9713.88
11-20111226.42$86.9614.1
12-20111243.32$86.9514.3
01-20121300.58$87.4814.87
02-20121352.49$88.0115.37
03-20121389.24$88.5415.69
04-20121386.43$88.3315.7
05-20121341.27$88.1315.22
06-20121323.48$87.9215.05
07-20121359.78$87.4515.55
08-20121403.45$86.9716.14
09-20121443.42$86.5016.69
10-20121437.82$86.5016.62
11-20121394.51$86.5116.12
12-20121422.29$86.5116.44
01-20131480.40$86.9117.03
02-20131512.31$87.3017.32
03-20131550.83$87.7017.68
04-20131570.70$88.7817.69
05-20131639.84$89.8718.25
06-20131618.77$90.9517.8
07-20131668.68$92.0918.12
08-20131670.09$93.2317.91
09-20131687.17$94.3717.88
10-20131720.03$96.3117.86
11-20131783.54$98.2618.15
12-20131807.78$100.2018.04
01-20141822.36$100.4218.15
02-20141817.04$100.6318.06
03-20141863.52$100.8518.48
04-20141864.26$101.6118.35
05-20141889.77$102.3618.46
06-20141947.09$103.1218.88
07-20141973.10$104.0718.96
08-20141961.53$105.0118.68
09-20141993.23$105.9618.81
10-20141937.27$104.7418.5
11-20142044.57$103.5319.75
12-20142054.27$102.3120.08
01-20152028.18$101.2920.02
02-20152082.20$100.2720.77
03-20152079.99$99.2520.96
04-20152094.86$97.8021.42
05-20152111.94$96.3621.92
06-20152099.29$94.9122.12
07-20152094.14$93.4922.4
08-20152039.87$92.0822.15
09-20151944.41$90.6621.45
10-20152024.81$89.2822.68
11-20152080.62$87.9123.67
12-20152054.08$86.5323.74
01-20161918.60$86.5022.18
02-20161904.42$86.4722.02
03-20162021.95$86.4423.39
04-20162075.54$86.6023.97
05-20162065.55$86.7623.81
06-20162083.89$86.9223.97
07-20162148.90$87.6424.52
08-20162170.95$88.3724.57
09-20162157.69$89.0924.22
10-20162143.02$90.9123.57
11-20162164.99$92.7323.35
12-20162246.63$94.5523.76
01-20172275.12$96.4623.59
02-20172329.91$98.3823.68
03-20172366.82$100.2923.6
04-20172359.31$101.5323.24
05-20172395.35$102.7823.31
06-20172433.99$104.0223.4
07-20172454.10$105.0423.36
08-20172456.22$106.0623.16
09-20172492.84$107.0823.28
10-20172557.00$108.0123.67
11-20172593.61$108.9523.81
12-20172664.34$109.8824.25
01-20182789.80$111.7324.97
02-20182705.16$113.5923.82
03-20182702.77$115.4423.41
04-20182653.63$117.7922.53
05-20182701.49$120.1322.49
06-20182754.35$122.4822.49
07-20182793.64$125.1222.33
08-20182857.82$127.7522.37
09-20182901.50$130.3922.25
10-20182785.46$131.0621.25
11-20182723.23$131.7220.67
12-20182567.31$132.3919.39
01-20192607.39$133.0619.6
02-20192754.86$133.7220.6
03-20192803.98$134.3920.86
04-20192903.80$134.6821.56
05-20192854.71$134.9821.15
06-20192890.17$135.2721.37
07-20192996.11$134.4822.28
08-20192897.50$133.6921.67
09-20192982.16$132.9022.44
10-20192977.68$135.0922.04
11-20193104.90$137.2822.62
12-20193176.75$139.4722.78
01-20203278.20$131.7624.88
02-20203277.31$124.0426.42
03-20202652.39$116.3322.8
04-20202761.98$111.3024.82
05-20202919.62$104.9327.82
06-20203104.66$99.2331.29
07-20203207.62$100.6831.86
08-20203391.71$98.5634.41
09-20203365.52$98.2234.27
10-20203418.70$95.0135.98
11-20203548.99$93.2338.07
12-20203695.31$90.7440.72
01-20213793.75$90.7441.81
02-20213883.43$90.7442.8
03-20213910.51$90.7443.1

Using the S&P 500 Price to Earnings Ratio Tool

The S&P 500 PE visualization tool lets you zoom in and out on the PE ratio history. If you're on a desktop or laptop, you can hover over the graph to see the PE ratio's value in any month.

The lower graph is a bush graph that controls your zoom. You can drag the window or move the handles on the right and left of the smaller window to change the top graph's historical view.

On the top right of the main graph, you'll find a few tools. Of interest: if you expand the hamburger menu, you can export the graph as a png or svg graphic, or export the backing data to a CSV for your analysis.

S&P 500 PE Ratio Summary Statistics

When you loaded the page, the tool automatically tallied up summary statistics for the S&P 500. You'll find:

  • Current PE (TTM) – The trailing twelve month price to earnings ratio for the last date/data pair in the tool
  • Average – The average PE over all-time on the S&P 500 and pre-market history, using monthly samples
  • Median – The median PE ratio over the history of the S&P 500
  • Minimum – The minimum PE ratio found in the dataset
  • Maximum – The maximum PE ratio found in the dataset
  • Last Data Point – The last 'full month' of earnings data (see note in 'Sources')

What is the Price / Earnings Ratio?

The price-to-earnings ratio is the price you pay for a security, divided by that security's earnings over some time. For the S&P 500, the Price to Earnings ratio is the weighted average earnings over all component stocks – in the same proportion as the index's market capitalization.

The traditional P/E ratio is measured over one year of earnings – the trailing twelve months. Notably, sometimes the Price to Earnings ratio is quoted for the Next Twelve Months (NTM), or even over the inflation-adjusted previous ten-year average (the Cyclically Adjusted PE, or CAPE).

Can the Price to Earnings ratio be used for market valuation?

Yes and no. Price to Earnings is a crude tool that can give you a snapshot of how fairly valued a stream of income is at the time, but it's a weak indicator.

As mentioned above, attempts to factor in longer history or future growth are potential ways to improve the indicator. Additionally, there are other ways to view profitability or the company's income streams – free cash flow, operating earnings, earnings before interest and taxes (EBIT), and earnings before interest, taxes, depreciation, and amortization (EBITDA) are alternative views or profitability.

Also, viewing earnings across a market capitalized index like the S&P 500 introduces a bit of Simpson's Paradox. Different industries are valued based on various metrics and have different structural margins and earnings. For example, technology companies tend to have higher earnings margins and PE ratios than consumer staples. When one industry makes up a higher proportion of the index, the value may look amazing or poor on the surface... while different component industries have wildly different value.

Finally, earnings are vulnerable to both the business cycle and accounting and tax law changes. As noted by William Hester at Hussman Funds back in 2007, earnings tend to snap back after a recession, and companies tend to overstate losses during a recession's trough. Additionally, GAAP – generally accepted accounting principles – change over time and materially affect earnings and losses – see how stock-based compensation's accounting changed over time.

S&P 500 Price to Earnings Ratio Sources and Methodology

The monthly S&P earnings and index averages are sourced from Robert Shiller's compilation of index statistics. Shiller has data back to 1871, even though the S&P 500 in its current form started in 1957 (with a smaller index existing to 1926.) Data before 1926 comes from the Cowles datasets.

The recession indicators (the grey shading in the S&P PE graph) are from the National Bureau of Economic Research's "peak-to-trough" recession measure. Note that they may be revised in the future.

The index price is the monthly average closing price. Earnings is the trailing twelve-month earnings for the index, as compiled by Shiller. Where there is no earnings data, the tool uses the last seen earnings (so earnings may be duplicated from the previous quarter for the most recent data.).

One last warning: data will be revised without warning. When earnings data is back-filled, the ratio will move materially.

Other Measures of Market Valuation

As you can see, valuing an index based on earnings is a rough tool. Here on DQYDJ, I've built several other tools which might give a better indication of a market's value; check them out:

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