MarketStack The Edit is an editorial layer for finance Substack, modelled on a paid-readership algorithm, The MarketStack Index. Every post you see is surfaced because its author earned their reach with subscribers — not because an editor picked it.
The Index — Narrative Physics
The MarketStack Index (MSI) quantifies real-time influence in the Finance Substack ecosystem, ranking the top 100 writers by momentum. In physics, momentum is mass × velocity:
Mass — durability on Substack’s Bestsellers list
Velocity — emergence on Substack’s Rising list
Two tags sit alongside the rank. Signals flags authors making statistically unusual moves today — big jumps, first appearances, returns after a long absence. Rising lists authors on Substack’s Rising list who fall outside the Index.
The Front Page
The lead story is chosen algorithmically each build, scored on author rank, how many writers are on the same theme, recency, and headline depth. No editorial discretion.
Not investment advice. MarketStack is an independent index and aggregator — all linked articles remain the property of their authors; we don’t host or reproduce them. Not affiliated with Substack.