~1 min read · 197 words ·updated 2026-04-29
Off-exchange / dark-pool activity — Coherent Corp.
Data source:
companies/cohr/data/STOCK_DARKPOOL.json. Auto-refreshed weekly from FINRA Alternative Trading System (ATS) volume reports.
What’s in the dataset
For each FINRA ATS reporting week the JSON dataset stores:
| Field | Description |
|---|---|
weekEndingDate | YYYY-MM-DD (Friday close) |
atsShares | Shares matched on ATS venues |
nonAtsShares | Shares matched off-exchange / non-ATS (broker-internalized) |
atsPctOfReportable | ATS share / FINRA-reportable consolidated tape |
Interpretation
FINRA ATS data captures dark-pool execution but excludes regulated exchange volume. Roughly:
- High ATS % suggests institutional flow concentrated in non-displayed venues (block-trade routing, anti-impact strategies)
- Low ATS % suggests retail / index flow dominant
- Large weekly shifts can correlate with index rebalances, M&A flow, or hedging programs
It is NOT a directional signal — high dark-pool % is consistent with both buying and selling pressure.
Notes for COHR specifically
Coherent’s NYSE listing means primary lit-market venue is NYSE; ATS share % typically runs 30–45% across large-cap NYSE optical-component names. Spikes during the post-March 2026 NVDA-deal window may reflect hedging or rebalancing flow on top of fundamental repositioning.