AsOf

Interactive Brokers · founded1977

valid: Two independent sources agree, or a primary source states it: the record asserts this claim, unless it is a post, is marked for review or carries a confidence below 0.5.asserted

What the statuses mean

Valid from
1977-01-01
Valid until
still holds
Published
no source on record carries a date
Recorded by AsOf
2026-11-11
Checked
2026-11-12 · its source page states the value and the date
Confidence
0.95

Sources

“Interactive Brokers History Equity Capital 1977 Thomas Peterffy (now Chairman of the Interactive Brokers (IBKR) Group) buys a seat on the American Stock Exchange (AMEX) and becomes a member, trading as an individual market maker in equity options.”— what the page says, read 2026-11-12

Cite this claim

Each form names the value, its as-of date (1977-01-01), the day you read it (2026-11-12), the claim's stable URL and id and its primary source. The URL never changes: a superseded claim stays at the same address.

Plain text
AsOf. "Interactive Brokers founded: 1977", as of 1977-01-01. Claim clm_AF1F71BE38D5, https://asof.is/claim/clm_AF1F71BE38D5, accessed 2026-11-12. Source: https://www.interactivebrokers.com/en/general/about/info-and-history.php.
APA
AsOf. (1977). Interactive Brokers founded: 1977 (as of 1977-01-01) [Record clm_AF1F71BE38D5]. Retrieved November 12, 2026, from https://asof.is/claim/clm_AF1F71BE38D5 (source: https://www.interactivebrokers.com/en/general/about/info-and-history.php)
BibTeX
@misc{asof_clm_AF1F71BE38D5,
  author = {AsOf},
  title = {Interactive Brokers founded: 1977},
  year = {1977},
  howpublished = {\url{https://asof.is/claim/clm_AF1F71BE38D5}},
  note = {Claim clm\_AF1F71BE38D5, as of 1977-01-01; source: https://www.interactivebrokers.com/en/general/about/info-and-history.php},
  urldate = {2026-11-12}
}

On the record

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