argenx drops 10.91% at the open, dwarfing every other loser
As seen on the 24/7 Wall St. homepage on October 8, 2026.
argenx is down 10.91% at the open, more than double any other decliner in a 382-stock universe. Palantir leads the gainers at 4.17%, with Big Oil names filling out the rest.
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argenx shed nearly 11% in the first minutes of trading on October 8, 2026, more than double the next worst decliner in the same universe. That gap is difficult to attribute to broad market pressure alone.
Cipher Mining, Arm, Applied Optoelectronics, and Iren round out the losers list with far shallower declines, making argenx's drop look company-specific rather than part of a sector-wide rotation.
On the other side of the ledger, Palantir leads all gainers, with BP, Equinor, ENI, and TotalEnergies filling out the top five. That points to a strong early bid across Big Oil running counter to the tech-adjacent pressure in Arm and Applied Optoelectronics.
For investors holding argenx or watching the biotech space, the scale of an opening gap this large in a high-priced stock warrants close attention as the session develops. A move of this magnitude at the open, without a comparable peer decline, is the kind of signal that tends to set the tone for the rest of the day's price action.