Westlake Consolidates Roofing Brands Under Single US Tile Name
The news is operational and positive, but options traders show no new positioning to confirm enthusiasm—call-heavy positioning predates this announcement.
GlobeNewsWire · 10/05
Undercurrent · Money-flow snapshot
WLK Max Pain, Dark Pool & Options Flow
WLK max pain for the Oct 16, 2026 expiry was $65 as of the Fri Oct 2 options chain.
What the institutional money is doing on WLK right now — dark pool, options positioning, and where the news and the money disagree. Free.
The money right now
Dark pool share
38.9% (market avg 51%)
Dark pool volume vs its norm
1.2×
Short share of that
58.7% (norm 56%)
Price
$63.39
Max pain
$65
as of 10/02
Call wall
$65
as of 10/02
Put floor
$60
as of 10/02
Put/Call ratio
0.12
Squeeze pressure
15
Dark pool share: 39% off-exchange — 12pp below the market
Off-exchange prints never touch the public book, so they move size without moving the quote. That is the point of using them. Most of the day cleared on the lit market — either there was nothing to hide, or the large players sat out. Short share of the off-exchange piece: 59% vs a 56% norm.
Source: FINRA · Tue 10/6 close
What it means: Options traders are heavily favoring calls over puts, with the call-to-put ratio at 8:1, signaling bullish positioning; off-exchange volume is running 20% above normal with a neutral short bias, suggesting institutional activity without directional conviction.
News vs the money
⚡ DIVERGENCEWestlake Shutters Cologne PVC Plant as European Demand Weakens
The news is defensive (acknowledging weak European conditions), yet options traders remain call-heavy with no new puts added—a potential divergence if European weakness is material.
Zacks Investment Research · 09/30
Westlake Optimizes European Chlorovinyls Operations by Closing Cologne Plant
Repeated messaging on the same closure suggests management is emphasizing the positive spin, but options traders have not shifted from their call-heavy stance.
GlobeNewsWire · 09/29
Westlake Expands PVC Trim Supply Deal With BlueLinx
The news is growth-oriented and aligns with the call-heavy options positioning, though no new call positions were opened to amplify the signal.
Zacks Investment Research · 09/28
Westlake Launches New Gable Vents for Mid-America Exterior Siding Line
Product innovation is constructive, consistent with the call-heavy options lean, but the lack of new option activity suggests traders view this as routine rather than transformative.
GlobeNewsWire · 09/28
See it live, free
Get Undercurrent — the news behind the money →Add WLK to My Watchlist in the free SIGNUM HQ app (iPhone · Android) →New to this? Why'd It Move? turns today's move into a 60-second lesson →What is a “divergence”?
A divergence is when the news narrative and the institutional money flow point in opposite directions — a bearish headline while large call premium is bought, or heavy dark-pool selling under a bullish story. It signals the crowd and the desks may disagree.
How to read these numbers
Dark-pool volume — The share of trading executed off-exchange, at wholesalers and dark pools. About half of all US share volume prints there on an ordinary day, so the level by itself says almost nothing. What carries information is the distance from this name’s own recent norm, and whether the off-exchange size ran above its usual.
Off-exchange short share — How much of that off-exchange volume was sold short. The median across all listed names is about 49%, because wholesalers filling retail buy orders sell short and cover later. A reading near half is plumbing, not a bearish vote — compare it to the same name’s own 20-day norm.
Max pain — The price where the most options expire worthless — positioning often gravitates toward it near expiry.
Call wall / Put floor — Strikes with the heaviest call/put open interest — they often act as short-term resistance and support.
Put/Call ratio — Below ~0.7 leans bullish (more calls); above ~1 leans defensive (more puts).
Nearby tickers
Today’s off-exchange leaders → · See all tickers →Today’s rankings — what broke from normal
Learn the numbers