Discover — OLN -16.96% + 3 more (4:30 PM ET)

$OLN collapsed 16.96% in after-hours trade, hitting $18.51 against a $22.17 prior close.

OLN printed $10.1M in after-hours dollar-volume — notable for an extended session — as price broke sharply lower. No fundamental coverage on our end; this is a pure tape flag. Watch for whether $18.51 holds into Sunday night futures open or whether sellers extend the move further.

Other names crossing threshold this cycle:

• ▸BFLY — down 13.46% to $7.11 ($10.9M dv); significant after-hours selling pressure on a low-priced name.
• ▸DXCM — up 11.95% to $83.45 ($11.9M dv); the lone green outlier this cycle with the strongest dollar-volume of the four names flagged.
• ▸CTVA — down 11.69% to $78.71 ($10.7M dv); double-digit decline from a $89.34 prior close with meaningful extended-session participation.