# RSJ Portfolio

> RSJ Portfolio is a Windows desktop application that builds a statistically optimized stock portfolio from historic end-of-day prices. It analyses the return correlation between stocks and allocates capital to candidates that correlate weakly — or whose downside correlates weakly — which reduces the volatility of the resulting portfolio. Allocation uses modern portfolio theory; the objective, the risk estimator and the weight constraints are all selectable.

RSJ Portfolio is a commercial product of RSJ Software GmbH (Holzstrasse 4, 82120 Germering, Germany).

Software facts:

- Windows 10 or 11, 64 Bit. It runs locally; no account is needed to use it.
- Single user, on premises license: **USD 99.00 one-time, VAT free**, including all updates within the same major version. There is no subscription.
- 13+ risk and allocation methods, 8 risk models, selectable return models and weight constraints.
- Maximum analysis timeframe: 10 years of historic prices.
- Two data providers: Yahoo Finance (free, personal use) and End of Day Historical Data (subscription with an API key, needed for commercial use).
- Portfolios quoted in more than one currency are converted via a USD path.
- The software only uses adjusted close prices, which frequently contain errors, so the price series are cleaned (interpolation, sigma clipping) before use.
- A signed Windows installer is available from this site; it sets up its own dependencies, including an embedded Python runtime.
- The product ships in English and German.
- RSJ Software GmbH offers no financial advice; the software is a tool and a financial advisor should be consulted before using it.

The site is bilingual: English at the root, German under `/de/`, with translated slugs.

## Product pages

- [Overview](https://portfolio.staging.rsj.de/): what the product does, the workflow, and what it costs. German: [Überblick](https://portfolio.staging.rsj.de/de/)
- [Methods and features](https://portfolio.staging.rsj.de/features): every allocation method (minimum volatility, maximum Sharpe ratio, minimum semi variance, hierarchical risk parity, conditional value at risk), the eight risk models, return models, weight constraints and exports. German: [Methoden und Funktionen](https://portfolio.staging.rsj.de/de/funktionen)
- [Data and currencies](https://portfolio.staging.rsj.de/data): the supported data providers, the price cleaning pipeline, the local cache, and the conversion path for portfolios quoted in several currencies. German: [Daten und Währungen](https://portfolio.staging.rsj.de/de/daten)
- [Getting started](https://portfolio.staging.rsj.de/guide): requirements, the configuration worth setting before the first run, the recommended starting parameters and how to read the results. German: [Erste Schritte](https://portfolio.staging.rsj.de/de/erste-schritte)
- [Pricing and license](https://portfolio.staging.rsj.de/pricing): the single user license, what it includes, and the checkout. German: [Preise und Lizenz](https://portfolio.staging.rsj.de/de/preise)
- [Downloads](https://portfolio.staging.rsj.de/downloads): the Windows installer (SHA-512 published on the page, in a versioned filename) and the user guide. German: [Downloads](https://portfolio.staging.rsj.de/de/downloads)

## User guide

The full user guide is built with MkDocs and served per language as HTML; each page lists the methods, parameters and results in detail.

- [User guide, English](https://portfolio.staging.rsj.de/downloads/guide/en/)
- [User guide, German](https://portfolio.staging.rsj.de/downloads/guide/de/)

Chapters, identical in both languages (swap `en` for `de`):

- [Installation and license](https://portfolio.staging.rsj.de/downloads/guide/en/installation.html): installing the software, and what the license covers
- [Selection](https://portfolio.staging.rsj.de/downloads/guide/en/selection.html): searching symbols, building a candidate list
- [Recommendation](https://portfolio.staging.rsj.de/downloads/guide/en/recommendation.html): the optimizer, its parameters and the resulting allocation
- [Configuration](https://portfolio.staging.rsj.de/downloads/guide/en/configuration.html): data provider, cache, local currency, date range and cleaning settings
- [Concept](https://portfolio.staging.rsj.de/downloads/guide/en/concept.html): the statistical background
- [Features](https://portfolio.staging.rsj.de/downloads/guide/en/features.html): the feature overview

## Optional

- [Product blog](https://portfolio.staging.rsj.de/blog/index.html): background articles on the optimizer, the data and the methods, written by the team building the product. The blog is served by a separate service behind the same host and is authored in German and English.
- [RSJ Software GmbH product page](https://www.rsj.de/portfolio.html): the manufacturer's page for this product.
- [Explainer video](https://www.youtube.com/watch?v=MkdrnH4eRxw): a short walkthrough of the product.

Note for agents: pages on this site are HTML only. There are no `.md` copies of the landing pages, and the user guide sources are not published. Summaries above are drawn from the product's own copy; the linked pages are the authoritative sources.