Market Atlas

Static dashboard

Data sources & freshness

Every chart is built from validated JSON committed with the site. This page shows what was fetched, what was preserved, and where the underlying data came from.

Validation tierL3Schema + sanity bounds
Manifest generatedSep 1, 2026, 5:26 AM UTC
Repository refrefs/heads/main
WorkflowRun 33473572007

Refresh operations

Validated after the U.S. close

On weekdays, GitHub Actions starts a refresh at 7:30 p.m. America/Chicago. Two UTC schedules cover daylight-saving changes; an offset guard selects the correct run, so a second successful no-op run is expected.

  1. 01
    Fetch

    Pull public market observations from each upstream source.

  2. 02
    Validate

    Apply schema checks and L3 market-data sanity bounds.

  3. 03
    Verify

    Run unit tests, static export, and route smoke checks.

  4. 04
    Publish

    Commit validated snapshots, then deploy the same artifact.

Automation contractData push failures stop the workflow.View workflow history

SPX research

Yahoo Finance SPX chart

ok
Last successful fetch
Sep 1, 2026, 5:26 AM UTC
Latest data row
Aug 31, 2026 · 8,472 rows
Primary source
query1.finance.yahoo.com
Download 18 weekday datasets
1m-openClose.json1m-closeClose.json3m-openClose.json3m-closeClose.json6m-openClose.json6m-closeClose.jsonytd-openClose.jsonytd-closeClose.json1y-openClose.json1y-closeClose.json2y-openClose.json2y-closeClose.json5y-openClose.json5y-closeClose.json10y-openClose.json10y-closeClose.jsonall-openClose.jsonall-closeClose.json

Preserve-on-failure policy

Fresh downloads must pass L3 validation before replacing committed data. If a source or validation step fails, Market Atlas keeps the previous valid snapshot and labels that source stale. Deployment only stops when every source fails and no fallback exists.