diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -415,6 +415,7 @@ A [wiki](https://en.wikipedia.org/wiki/Wiki) is a publication collaboratively ed
 - [Money-Balancer](examples/money-balancer) - A simple application for managing debt with your friends!
 - [Firefly III](examples/firefly) - A self-hosted manager for your personal finances.
 - [VoucherVault](examples/vouchervault) - Django web application to store and manage vouchers, coupons, loyalty and gift cards digitally. Supports expiry notifications, transaction histories and file uploads.
+- [QuantRank500](examples/quantrank500) - Self-hosted public record of stock predictions, locked before the market opens and settled automatically against exchange data, kept in an append-only hash-chained ledger.
 
 ### Genealogy
 
diff --git a/examples/quantrank500/README.md b/examples/quantrank500/README.md
new file mode 100644
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@@ -0,0 +1,22 @@
+# References
+
+- https://github.com/RusUsf/quantrank500
+- https://quantrank500.com
+- https://github.com/RusUsf/quantrank500/tree/master/examples
+
+# Notes
+
+No image is published to a registry yet, so `api` and `worker` build straight
+from the git context. The first `docker compose up` therefore compiles the
+image; later starts reuse it.
+
+Both services run the same image and differ only in the command: `api` serves
+the public HTTP API on port 8000, `worker` runs the nightly settlement replay.
+
+Change `CHANGEME` in all four places (the Postgres password and the two DSNs)
+before starting.
+
+The upstream repository also ships an nginx service that serves the static
+frontend and rate-limits the API. It is left out here because it bind-mounts
+files from a checkout; clone the repository and use its own
+`docker-compose.yml` if you want the web UI as well.
diff --git a/examples/quantrank500/docker-compose.yml b/examples/quantrank500/docker-compose.yml
new file mode 100644
index 000000000..ff301b7a7
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+++ b/examples/quantrank500/docker-compose.yml
@@ -0,0 +1,67 @@
+services:
+
+  quantrank500-db:
+    image: postgres:16
+    container_name: quantrank500-db
+    hostname: quantrank500-db
+    restart: unless-stopped
+    expose:
+      - 5432
+    volumes:
+      - ${DOCKER_VOLUME_STORAGE:-/mnt/docker-volumes}/quantrank500/postgres:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_USER=quantrank
+      - POSTGRES_PASSWORD=CHANGEME
+      - POSTGRES_DB=quantrank500
+      - TZ=Europe/Berlin
+    networks:
+      - quantrank500
+
+  quantrank500-api:
+    build: https://github.com/RusUsf/quantrank500.git
+    container_name: quantrank500-api
+    hostname: quantrank500-api
+    restart: unless-stopped
+    depends_on:
+      - quantrank500-db
+    ports:
+      - 8000:8000/tcp
+    expose:
+      - 8000
+    environment:
+      - QR500_ENV=dev
+      - QR500_API_HOST=0.0.0.0
+      - QR500_PG_DSN=postgresql://quantrank:CHANGEME@quantrank500-db:5432/quantrank500
+      - QR500_LAKE_DSN=postgresql://quantrank:CHANGEME@quantrank500-db:5432/quantrank500
+      - TZ=Europe/Berlin
+    networks:
+      - quantrank500
+    #  - proxy
+    #labels:
+    #  - traefik.enable=true
+    #  - traefik.docker.network=proxy
+    #  - traefik.http.routers.quantrank500.rule=Host(`quantrank500.example.com`)
+    #  - traefik.http.routers.quantrank500.entrypoints=https
+    #  - traefik.http.routers.quantrank500.tls=true
+    #  - traefik.http.services.quantrank500.loadbalancer.server.port=8000
+
+  quantrank500-worker:
+    build: https://github.com/RusUsf/quantrank500.git
+    container_name: quantrank500-worker
+    hostname: quantrank500-worker
+    restart: unless-stopped
+    command: ["python", "scripts/run_worker.py"]
+    depends_on:
+      - quantrank500-db
+    environment:
+      - QR500_ENV=dev
+      - QR500_PG_DSN=postgresql://quantrank:CHANGEME@quantrank500-db:5432/quantrank500
+      - QR500_LAKE_DSN=postgresql://quantrank:CHANGEME@quantrank500-db:5432/quantrank500
+      - TZ=Europe/Berlin
+    networks:
+      - quantrank500
+
+networks:
+  quantrank500:
+  #proxy:
+  #  external: true