Timeline
A dated record of the establishment of the Index 9000, its methodology revisions, and the principal market events of its record. Index levels shown are from the Index’s own series.
1970s
31 December 1976
The base date. The Index did not exist; its record is calculated back to this day from real market data, and would not have been available at the time.
February 1978
Ten percent from the base before the index is fifteen months old, dividends included.
1980s
March 1982
Thirteen percent from the 1981 peak over eleven months, recovered by October 1982. The bull market that follows runs for five years.
19 October 1987
The Index falls twenty percent from its August peak by the end of November and recovers the peak in November 1988.
2000s
March 2000
The longest decline in the record begins: forty-seven percent over thirty months.
January 2006
The Index recovers its March 2000 peak five years and ten months later, with reinvested dividends accounting for part of the recovery.
October 2007
The deepest fall in the record: fifty-eight percent to 9 March 2009, seventeen months down and four years to recover the peak, in April 2013.
2010s
2019
Investor education material published by Robinhood shows the index fund of a neighbouring universe, named the IDX 9000. The Index did not yet exist.
2020s
March 2020
Thirty-four percent between 12 February and 23 March 2020, the fastest decline in the record, recovered by 24 August 2020.
September 2026
$IDX, a meme coin, is launched on Robinhood Chain, paired with the tokenized S&P 500 fund and paying its holders in it. Its community goes on to build the Index 9000. The back-calculated record stands at 146,061.16, 146 times base, 10.55 percent a year since the base date with dividends reinvested.
19 September 2026
Nine thousand real companies in forty-four markets, priced from public exchange feeds every three minutes, with a divisor set so that the live record continues the back-calculated record at 146,061.16 without a break. Rulebooks 1.5 and 1.6 record the basis: live data, and dividends reinvested. From this day the level on the site is the level.