Skip to content
Research
KnowledgeVisuals
Pricing↗Open the workspace↗Get a free API key↗
.orgResearchResearch — current site.netWorkspace↗Workspace — opens riskmodels.net.appAPI↗API — opens riskmodels.app
Next filing · Form 13F · Q2 2026 · 3 days
Next filing · Form 13F · Q2 2026 · 3 daysMethodology Paper · Part III published: The One Manager Skill That PersistsAPI Update · Point-in-Time (PIT) historical commit tracking — securities and funds unifiedAPI Update · ERM3 L3 variance partition — institutional transparency releasePart 3 · The Persistence of Stock-Selection ResidualsPart 1 · One Position, Four BetsNext filing · Form 13F · Q2 2026 · 3 daysMethodology Paper · Part III published: The One Manager Skill That PersistsAPI Update · Point-in-Time (PIT) historical commit tracking — securities and funds unifiedAPI Update · ERM3 L3 variance partition — institutional transparency releasePart 3 · The Persistence of Stock-Selection ResidualsPart 1 · One Position, Four Bets
Ledger

Risk decomposition

AAPL

Market → sector → subsector → α-residual · 2026-02-18 → 2026-08-10

AAPL factor & risk decomposition snapshot
Market
+10.7%
Sector
-4.6%
Subsector
-1.6%
α residual
+12.3%
Stock
+16.8%

Every position carries the market, its sector, and its subsector before any stock-specific move. The waterfall splits AAPL's realized return into those benchmark layers; the α residual is what the three hedge layers do not explain.

source: RiskModels — GET /ticker-returns?ticker=AAPL&years=1

How the decomposition works →Research →Run any ticker via the API →

RiskModels.org

A research surface for hierarchical orthogonal decomposition, variance attribution, and allocator-grade risk measurement. Operational APIs and developer workflows live at riskmodels.app.

Subscribe to the Quarterly Attribution Review.

Research notes on risk decomposition, fund attribution, 13F filings, and benchmark structure — a few times a quarter.

By registering, you agree to receive technical factor research and API deployment logs. RM-Registry-2026. Privacy Policy.

Sign inHomePrimerWorkspaceResearchKnowledgeConceptsReviewsLedgerReferencesAboutSubscribeMethodology noteOne-pagerAPI docsWeb appContactPrivacyStatusRSS
RiskModelsResearch/Workspace/API