Andreas Buchen

Andreas Buchen is an independent German developer whose open-source tool “Portfolio Performance” has become a reference among European private investors who want to track stocks, ETFs, bonds, cryptocurrencies and offline assets in one place. Written in Java and extensible through plug-ins, the program aggregates transactions from bank statements (CSV, PDF, JSON), automatically retrieves live prices from Yahoo Finance, OnVista, AlphaVantage or the ECB, and then calculates true-time-weighted and internal-rate-of-return figures for each security, account and the whole portfolio. Users can model complex structures such as accrued interest, taxes, fees, splits, dividends and even derivative trades, while charts compare performance against benchmark indices or custom targets. A built-in taxonomy editor supports classification by region, sector or sustainability score, and PDF or HTML reports can be generated in German, English, French, Italian or Spanish. Because all data remains stored locally in an XML file, the software appeals to privacy-minded investors who distrust cloud services but still want professional-grade analytics. Typical use cases range from a household simply checking whether its MSCI World ETF beats inflation to hobby traders who rebalance monthly and need precise IRR figures for their tax return. Andreas Buchen’s Portfolio Performance is offered free of charge on get.nero.com, where the latest Windows build is delivered through the trusted winget repository, installs silently and can be pulled in bulk alongside other applications.