{"schema_version":1,"meta":{"initial_generated_date":"2026-09-14","generated_at":"2026-09-14T09:11:54+00:00","start_date":"1950-01-06","latest_date":"2026-09-10","point_count":4002,"latest_earnings_month":"2026-06","sources":[{"id":"OpenIntro_Yahoo_archive","title_zh":"OpenIntro：Yahoo 标普历史收盘价归档","title_en":"OpenIntro: archived Yahoo S&P closing prices","url":"https://www.openintro.org/data/index.php?data=sp500_1950_2018","download_url":"https://vincentarelbundock.github.io/Rdatasets/csv/openintro/sp500_1950_2018.csv"},{"id":"Shiller","title_zh":"Robert Shiller：标普名义滚动四季盈利","title_en":"Robert Shiller: nominal S&P four-quarter earnings","url":"https://shillerdata.com/"},{"id":"SP500","title_zh":"FRED / SP500","title_en":"FRED / SP500","url":"https://fred.stlouisfed.org/series/SP500"},{"id":"DGS10","title_zh":"FRED / DGS10","title_en":"FRED / DGS10","url":"https://fred.stlouisfed.org/series/DGS10"},{"id":"GS10","title_zh":"FRED / GS10","title_en":"FRED / GS10","url":"https://fred.stlouisfed.org/series/GS10"},{"id":"LTGOVTBD","title_zh":"FRED / LTGOVTBD","title_en":"FRED / LTGOVTBD","url":"https://fred.stlouisfed.org/series/LTGOVTBD"}],"source_latest_dates":{"SP500":"2026-09-11","DGS10":"2026-09-10","GS10":"2026-08-01","LTGOVTBD":"2000-06-01","OpenIntro":"2018-12-07","Shiller_earnings":"2026-06-30"},"overlap":{"count":565,"start_date":"2016-09-12","end_date":"2018-12-07","max_absolute_difference":0.040049,"max_unexplained_difference":0.000117,"reviewed_discrepancies":[{"date":"2018-11-29","archive_close":2737.800049,"fred_close":2737.76,"selected_source":"FRED_SP500"}],"tolerance_index_points":0.02,"primary_after":"2016-09-12"},"method":{"zh":"每周取价格与收益率共同可得的最后交易日。1962 年起收益率为该日 DGS10；更早各周沿用最近已完结月均值，其中 1953 年 4 月前的月份采用 LTGOVTBD 长期美债篮子代理，随后采用 GS10。市盈率为该日标普收盘价除以最近已完结月份的 Shiller 名义滚动四季盈利；盈利源由季度数据插值为月度，属于事后修订口径，不能用于当时信息集回测。最新盈利月份之后缺失的月份沿用最后已提供盈利，并逐点标记。1957 年 3 月 4 日之前指数为历史回溯序列。","en":"Each week uses the last trading date with both price and yield. From 1962 yields are same-day DGS10. Earlier weeks carry the latest completed monthly average: LTGOVTBD long Treasury basket proxy for months before April 1953, then GS10. P/E equals that date’s S&P close divided by nominal Shiller trailing-four-quarter earnings for the latest completed month. Earnings are interpolated from quarterly to monthly data and revised ex post, so this is unsuitable for point-in-time backtesting. Missing months beyond the latest supplied earnings month carry that earnings value with a per-point flag. Index history before March 4, 1957 is a backcast."}},"points":[{"date":"1950-01-06","week_ending":"1950-01-06","sp500":16.98,"us10y":2.19,"pe":7.318966,"earnings":2.32,"earnings_month":"1949-12","yield_source":"LTGOVTBD","yield_source_date":"1949-12-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-01-13","week_ending":"1950-01-13","sp500":16.67,"us10y":2.19,"pe":7.185345,"earnings":2.32,"earnings_month":"1949-12","yield_source":"LTGOVTBD","yield_source_date":"1949-12-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-01-20","week_ending":"1950-01-20","sp500":16.9,"us10y":2.19,"pe":7.284483,"earnings":2.32,"earnings_month":"1949-12","yield_source":"LTGOVTBD","yield_source_date":"1949-12-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-01-27","week_ending":"1950-01-27","sp500":16.82,"us10y":2.19,"pe":7.25,"earnings":2.32,"earnings_month":"1949-12","yield_source":"LTGOVTBD","yield_source_date":"1949-12-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-02-03","week_ending":"1950-02-03","sp500":17.290001,"us10y":2.2,"pe":7.399419,"earnings":2.33667,"earnings_month":"1950-01","yield_source":"LTGOVTBD","yield_source_date":"1950-01-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-02-10","week_ending":"1950-02-10","sp500":17.24,"us10y":2.2,"pe":7.378021,"earnings":2.33667,"earnings_month":"1950-01","yield_source":"LTGOVTBD","yield_source_date":"1950-01-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-02-17","week_ending":"1950-02-17","sp500":17.15,"us10y":2.2,"pe":7.339505,"earnings":2.33667,"earnings_month":"1950-01","yield_source":"LTGOVTBD","yield_source_date":"1950-01-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-02-24","week_ending":"1950-02-24","sp500":17.280001,"us10y":2.2,"pe":7.39514,"earnings":2.33667,"earnings_month":"1950-01","yield_source":"LTGOVTBD","yield_source_date":"1950-01-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-03-03","week_ending":"1950-03-03","sp500":17.290001,"us10y":2.24,"pe":7.347036,"earnings":2.35333,"earnings_month":"1950-02","yield_source":"LTGOVTBD","yield_source_date":"1950-02-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-03-10","week_ending":"1950-03-10","sp500":17.09,"us10y":2.24,"pe":7.26205,"earnings":2.35333,"earnings_month":"1950-02","yield_source":"LTGOVTBD","yield_source_date":"1950-02-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-03-17","week_ending":"1950-03-17","sp500":17.450001,"us10y":2.24,"pe":7.415025,"earnings":2.35333,"earnings_month":"1950-02","yield_source":"LTGOVTBD","yield_source_date":"1950-02-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-03-24","week_ending":"1950-03-24","sp500":17.559999,"us10y":2.24,"pe":7.461767,"earnings":2.35333,"earnings_month":"1950-02","yield_source":"LTGOVTBD","yield_source_date":"1950-02-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-03-31","week_ending":"1950-03-31","sp500":17.290001,"us10y":2.27,"pe":7.295359,"earnings":2.37,"earnings_month":"1950-03","yield_source":"LTGOVTBD","yield_source_date":"1950-03-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-04-06","week_ending":"1950-04-07","sp500":17.780001,"us10y":2.27,"pe":7.50211,"earnings":2.37,"earnings_month":"1950-03","yield_source":"LTGOVTBD","yield_source_date":"1950-03-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-04-14","week_ending":"1950-04-14","sp500":17.959999,"us10y":2.27,"pe":7.578059,"earnings":2.37,"earnings_month":"1950-03","yield_source":"LTGOVTBD","yield_source_date":"1950-03-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_backcast":true},{"date":"1950-04-21","week_ending":"1950-04-21","sp500":17.959999,"us10y":2.27,"pe":7.578059,"earnings":2.37,"earnings_month":"1950-03","yield_source":"LTGOVTBD","yield_source_date":"1950-03-01","yield_frequency":"monthly","earnings_extended":false,"price_source":"OpenIntro_Yahoo_archive","index_b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