Arm Holdings plc.

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.

AMC Entertainment's 10.88% jump to $3.26 was the only double-digit move of the session, and the downside was where the size was: five names finished off more than 6%, led by Arm at -8.48%. Chip and consumer-tech leaders took the brunt of it.

Arm's 8.5% slide was the deepest move in a 111-stock priority list at Wednesday's close, with Bruker leading the upside at 7.5%.

Arm closed up 17.19% at $323, topping a session where four other priority names each added more than 12%. Declines stayed shallow: Novo Nordisk's 7.94% drop was the only one past 4%, with Exxon Mobil and Chevron down under 3%.

Zscaler finished Monday up 16.8% at $192.17 while Coherent shed 12.5%. Four of the top five gainers are cybersecurity names, and four of the five losers are chip and infrastructure plays.

Arista Networks closed up 6.2%, the best move in a 111-stock priority list where hardware names took the top four gainer slots. Snap fell 8% to $5.45, the day's steepest decline.

Futu Holdings closed up 9.75%, the biggest move in a 110-stock priority list where five names finished higher by 5% or more. The downside was far tamer: only Cipher Mining lost more than 4%.