~1 min read · 255 words ·updated 2026-04-29
Market data overview
Auto-refreshed daily via the standard photonics-research data pipeline (Yahoo Finance OHLC, FINRA short interest, EDGAR institutional holdings, Form 4 insider activity).
Coverage
| Stream | Source | Refresh |
|---|---|---|
| Daily OHLC | Yahoo Finance | Daily after NYSE close |
| Short interest | FINRA / NYSE disseminated | Bi-monthly settlement-date prints |
| Institutional 13F/13G | EDGAR | Quarterly (45 days post quarter-end) |
| Form 4 insider transactions | EDGAR | Real-time (US-domestic; no HFIAA gap) |
| Options chain | Yahoo Finance derivatives feed | Daily |
| Off-exchange / dark-pool % | FINRA ATS | Weekly |
Domestic filer note: Coherent is a US-domestic filer and has always required real-time Form 4 reporting on insider transactions — no HFIAA gap. 10b5-1 trading plans are common among COHR NEOs and should be tagged when present.
Sub-pages
- Stock price history — 10y daily series with annotated events (Finisar close Sep 2019, Coherent Inc. close Jul 2022, rename Sep 2022, NVDA $2B investment Mar 2026)
- Short interest history — bi-monthly FINRA series
- Institutional holders — 13F/13G top holders, quarterly delta, NVDA strategic stake reporting, Bain Capital + Senator Investment Group via Series B Mandatory Convertible Preferred
- Insider transactions log — Form 4 series, with 10b5-1 plan flags
- Options chain — IV term structure, OI heatmap (NVDA-investment-driven IV regime)
- Off-exchange / dark-pool — FINRA ATS share %
- Credit / debt market positioning — term loan, senior notes, Series B Mandatory Convertible Preferred posture