What the institutional money is doing on DGX right now — dark pool, options positioning, and where the news and the money disagree. Free.
The money right now
Dark pool share
31.3% (market avg 51%)
Dark pool volume vs its norm
0.7×
Short share of that
63.9% (norm 65%)
Dark pool share: Off-exchange volume was quiet at 0.7× its norm
Off-exchange prints never touch the public book, so they move size without moving the quote. That is the point of using them. Large players were quiet in this name today. The share (31.3%) may look normal, but the absolute size behind it was thin.
Source: FINRA · prior close · 2026-08-28
What it means: DGX shows mixed signals: institutional investors are buying shares and the stock hit a 52-week high, but off-exchange volume is running 32% below normal while short-selling activity remains elevated at 64% of dark-pool trades—suggesting insiders may be quietly distributing into strength rather than accumulating.
News vs the money
Bank OZK Builds New Position in Quest Diagnostics
The institutional buying aligns with call-heavy positioning (put-to-call ratio 0.76), but dark-pool volume is running well below normal and short-selling remains high, suggesting the buying may be meeting existing supply rather than driving fresh accumulation.
Defense World
Artia Global Partners LP Opens New Stake in Quest Diagnostics
Similar to the OZK move, this buying is consistent with call-leaning options positioning, but the weak dark-pool volume ratio (0.68 vs. normal) and elevated short-selling share (64% vs. 65% norm) suggest these positions may be tactical rather than conviction-driven accumulation.
Defense World
Quest Diagnostics CEO to Present at Healthcare Conference
The conference appearance is neutral corporate activity; money signals show no new option positioning and dark-pool distribution regime, so this is likely routine investor relations rather than a catalyst.
PRNewsWire
Quest Launches Biological Age Testing Through Consumer Platform
Product expansion is operationally positive, but options positioning remains call-heavy without fresh conviction (no new open interest), and dark-pool activity shows distribution regime—money is not yet pricing this as a material catalyst.
PRNewsWire
⚡ DIVERGENCEQuest Diagnostics Hits New 52-Week High
The 52-week high aligns with call-heavy options lean (0.76 put-to-call), but dark-pool volume is 32% below normal and short-selling remains elevated in off-exchange trades—a classic sign that insiders are distributing into retail-driven strength rather than accumulating at new highs.
Defense World
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).