Master Database
The full underlying layer, one tier per ticker per quarter, across every index we track.
Overview
Master Database is the foundation from which the rest of the product line is built: one PCS tier per ticker per quarter, computed once and tagged with the tracked index (or indices) to which that ticker belongs. Where a name sits in more than one index, its tier is computed once and reused, never recalculated per product, so there's a single source of truth across the whole line.
Today, that means combined S&P 500 and Nasdaq-100 coverage in a single feed; the same architecture is designed to extend to additional indices over time without changing its structure.
What You Get
- Every ticker Milligan Research scores, tagged by which tracked index(es) it belongs to
- Current Tier (1-4) and 4-quarter trailing history per ticker
- The same underlying data, PCS 500, PCS ESG 500, and PCS 100, are each derived from
What's Not Included
- The underlying PCS score or formula coefficients
- Portfolio weights, position sizing, or trade recommendations
Sample Record
{
"ticker": "EXMPL",
"indices": ["sp500", "nasdaq100"],
"current_tier": 1,
"quarter": "2026-05-01"
}Illustrative example. Ticker and values are for format only, not live output.
Product Specs
- Universe
- Union of all tracked indices
- Coverage today
- S&P 500 + Nasdaq-100
- Tiers
- 1-4
- Cadence
- Quarterly
- Delivery
- Structured data file
Built For These Teams
Cross-Index Desks
One feed instead of licensing each index product separately.
Data & Platform Teams
Build custom index-crossing screens on top of a single source of truth.
Firms Expecting to Scale
Add coverage as new indices are added to the Master Database.
All products deliver ticker and tier classification only, never portfolio weights, position sizing, or trade recommendations. Neither Michael Milligan nor Nina Milligan, CFP®, is a registered investment adviser or holds a securities license, and nothing in these products constitutes investment advice.