---
title: "Valuation model lines: static vs. point-in-time"
method: GET
path: "/api/v1/reference-models"
tags: ["History"]
---

# Valuation model lines: static vs. point-in-time

`GET /api/v1/reference-models`

## Request

- Base URL: `https://tradingstrategies.work`
- URL: `https://tradingstrategies.work/api/v1/reference-models`
- Auth: HTTP bearer

How much does a valuation-model line depend on when it was computed? Per model the line fitted on all data to today (static) next to the point-in-time line: median-growth-rate model (MAGR/CAGR from anniversary returns since an anchor) and, for BTC, the log-log power-law / rainbow centre line (author constants and full-sample fit vs. monthly refit on prior data). target_year_drift re-runs the method at every completed year. spread_pp (MAGR minus CAGR) is a band over 12 year boundaries. computed_as_of names the data cut. BTC closes before the Binance era are withheld. Not a forecast, not a signal.

## Query parameters

- `asset` 'BTC' | 'ETH' | 'SOL'
- `anchor` string, date
- `target_year` integer
- `detail` 'summary' | 'full'

## Response `200`

Model container: growth_rate (anchor, static_rates, spread_pp band, deviation, returns, points), log_log (BTC), target_year_drift, provenance, resolution and tier echo.

- object

## Other responses

- `400`: Invalid input — fehlt Pflichtfeld oder Wert außerhalb des erlaubten Bereichs.
- `401`: Unauthenticated — kein gültiger Bearer-Token im Authorization-Header.
- `403`: Tier-Insufficient — Endpoint braucht höheren API-Tier. Response enthält upgrade_url.
- `404`: Not-Found — Resource existiert nicht oder gehört nicht dem aktuellen User.
- `429`: Rate-Limit überschritten — Tier-Quota (hourly/daily) oder Per-Endpoint-Quota erreicht. Retry-After-Header gesetzt.
- `500`: Internal Error.
- `503`: Upstream-Failure — Datenquelle nicht erreichbar (Binance, EODHD, etc.).

---

[API](https://skmtc.dev/tradingstrategies/apis/backtesting-arena-public-api.md) · [All operations](https://skmtc.dev/tradingstrategies/apis/backtesting-arena-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/tradingstrategies/apis/backtesting-arena-public-api/revisions/f82e8d6eecd7?raw)