Each dot is a run of records, placed at the change after its first record. Green: the index higher, red: lower. Dashed line: the average after any day. Hover a dot for its date; every run is listed below.
Every run of records
A record is a close at or above every earlier close in the price index's whole history. A run starts at the first record after at least 3 months without one. "Every record day" counts all record days, so long runs weigh more in it; its chance figure comes from shifting the whole calendar of records. From 1988 (the Russell 1000 from 1994); with dividends for the S&P 500 (from 1988) and the Russell 2000 (from 1995) only. The chance figure for runs is the study's: it compares the runs' median with the median of the same number of random days. Data: Yahoo Finance, to 6 October 2026. The numbers are the study's own.