---
title: "Top movers leaderboard - NAV or total-assets delta"
method: GET
path: "/api/v1/ecb/ivf/changes"
tags: ["Hedge Fund Intelligence"]
---

# Top movers leaderboard - NAV or total-assets delta

`GET /api/v1/ecb/ivf/changes`

Countries ranked by absolute change in selected metric across periods. ?period=mom compares the latest month to one month back; ?period=yoy compares to twelve months back. Sort is by absolute delta descending so both biggest accumulators and biggest divestors appear at the top. Excludes the U2 aggregate (would self-compare) and skips countries with insufficient history. Filters defunct entries by latest_period match (W5 staging-smoke pattern).

## Query parameters

- `period` string — `mom` = month-over-month; `yoy` = year-over-year.
- `sector` string
- `metric` string
- `limit` integer

## Response `200`

Top movers ranked by absolute change.

- EnvelopeIvfChanges
  - `data` IvfChanges, required — Top movers leaderboard - value delta sorted by absolute change.
    - `period` string, required — `mom` = month-over-month; `yoy` = year-over-year (12 months).
    - `sector` string, required
    - `sector_code` string, required
    - `sector_label` string, required
    - `metric` string, required
    - `metric_item` string, required
    - `metric_label` string, required
    - `count` integer, required
    - `rows` IvfRankedRow[], required
      - `rank` integer, required
      - `country` string, required
      - `name` string, required
      - `value_eur_mn` number, nullable
      - `period_current` string, nullable
      - `period_prior` string, nullable
      - `value_current_eur_mn` number, nullable
      - `value_prior_eur_mn` number, nullable
      - `delta_eur_mn` number, nullable — value_current - value_prior in EUR millions; positive = increase.
      - `delta_pct` number, nullable — Percentage change. None when prior is zero.
      - `period` string, nullable
      - `flow_eur_mn` number, nullable — Transaction flow value in EUR millions; positive = net subscriptions, negative = redemptions.
  - `meta` SugraMeta, required — Metadata attached to every /api/v1/* response envelope.
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 UTC timestamp of the source data, not of the request.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.

## Other responses

- `401` — Missing or invalid `x-api-key` header. JSON body with a stable `code` distinguishing `missing_api_key` (no header sent) from `invalid_api_key` (header sent, key not accepted); any other 401 source carries the generic `unauthorized` with its detail as `reason`. Plus `hint`. `plan` is always null on 401 - an unauthenticated request has no plan; quota exhaustion is 429, not 401.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

[API](https://skmtc.net/sugra/apis/sugra-api.md) · [All operations](https://skmtc.net/sugra/apis/sugra-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/sugra/sugra-api/versions/4c4530760ba1/schema)