MarketAxess is trading 28.99% down now at $115.41 after no clearly verified company-specific catalyst was identified for the August 11, 2026 after-hours move.
- The latest relevant announcement was Intercontinental Exchange beginning a bond sale to finance its MarketAxess acquisition; available reporting showed MarketAxess up 0.04%, so it does not explain the decline.
- The regular session was essentially flat at $162.53, while major indexes declined modestly.
- The unusually large after-hours move remains unexplained and may warrant rechecking for delayed news or a pricing issue.