L0 Data
Market Data Control Plane
The default provider is Yahoo Finance chart API for US equity daily . Every result carries provider, freshness, adjusted-close, and fallback metadata.
Symbols
28
Real loaded
28
Adjusted
26
Fallback
0
Range
3y
Dataset generated Jul 4, 2026, 4:47 AM; routes revalidate every 60 minutes.
Methodology / Assumptions
- Provider order is Yahoo Finance first, optional Polygon and Alpha Vantage after that, then deterministic fallback/demo data if all real providers fail.
- For demo responsiveness, the app can use a committed real Yahoo snapshot when live providers miss the short page-load budget; snapshot rows still disclose provider, coverage, and message.
- The default date range is 3 years of daily OHLCV bars.
- Adjusted close is used when Yahoo provides it; rows disclose whether the price basis is adjusted or raw/demo.
- Fallback/demo rows are labeled in the status, price basis, and message columns.
Provider Transparency
Yahoo Finance chart API remains visible in the UI, and all fallback/demo substitutions are disclosed.
Adjusted Close Awareness
Corporate-action-adjusted price series are used when Yahoo provides adjusted close data.
Fallback Discipline
Fallback data keeps the demo resilient, but it is never presented as real market validation.
| Symbol | Provider | Status | Price basis | Rows | Coverage | Message |
|---|---|---|---|---|---|---|
| AAPL | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| MSFT | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| NVDA | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| GOOGL | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| META | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| AMZN | Yahoo Finance chart API | real data ok | raw/demo close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded |
| TSLA | Yahoo Finance chart API | real data ok | raw/demo close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded |
| HD | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| MCD | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| PG | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| KO | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| WMT | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| JPM | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| BAC | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| V | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| JNJ | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| UNH | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| PFE | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| XOM | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| CVX | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| CAT | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| HON | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| NEE | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| DUK | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| AMT | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| O | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| SPY | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |
| QQQ | Yahoo Finance chart API | real data ok | adjusted close | 753 | 2023-07-03 → 2026-07-02 | Real daily OHLCV data loaded and adjusted for corporate actions |