Private beta · free

Test your portfolio before you invest.

Backtests with real prices, savings plans and German taxes, plus optimisation, Monte Carlo, look-through and factor analysis. All in one tool, no spreadsheets.

Beta with limited places: if none is free right now, you join the waitlist and get an email as soon as it's your turn.

Xetra ETFs by ISIN and WKN
Base currency EUR
German withholding tax and Vorabpauschale
Transparent methodology

Sample backtest

Sample data

10.000 € starting capital, three sample portfolios, 20 years.

A look inside the app.

This is what results look like in Portfolio Lab, here with made-up sample data. With an account you run the same analyses with real prices and your own portfolios.

Five areas, 25 tools.

All tools work with the same data and settings. Pick an area to see what the tools can do.

BacktestCompare up to three portfolios with rebalancing, savings plan or withdrawals, costs and German flat-rate tax, including drawdowns and calendar years.Savings plan and withdrawalsFlat-rate taxLeverage per securityValue thresholdPDF report

TacticalTest moving average, dual momentum, relative strength, target volatility and adaptive asset allocation with real prices.Dual momentumPAA, VAA, DAARegime (HMM)Target volatility

CPPIPortfolio insurance with equity, bond and cash parts, multiplier and floor, compared with buy-and-hold and a fixed mix.TIPPLock-inLeverageRebalancing

Long/ShortPairs trading, portfolios of pairs, factor residuals and rank long/short, with costs, borrow fees and interest on cash.Pairs tradingAvellaneda/LeeRank long/short

CarryCurrency carry with G10 and emerging market currencies and bond carry along the yield curve, since the 1970s.Volatility targetingCrash filterBond carry

What makes Portfolio Lab different.

202Long time series in euros

Asset classes from equity markets and bonds to reinsurance, some from 1926. Plus every Xetra symbol, converted into your base currency.

§ 20German taxes included

Withholding tax, partial exemption, Vorabpauschale, saver's allowance and loss offsetting, in the backtest and in financial goals.

13Asset classes in the look-through

Institutional taxonomy with regions, sectors, risk drivers and the largest holdings across all funds.

Get started in three steps.

1Create account

An email address and a password are all you need.

2Confirm your email

One click on the link in the email. Places are limited during the beta: if none is free right now, you join the waitlist and get an email as soon as it's your turn.

3Compare portfolios

Add ETFs by name, ISIN or WKN or load a template, on your computer and your phone, always in sync.

From the knowledge base.

Five articles to browse, reshuffled on every visit.

All articles

Return and risk

Correlation and diversification: how to lower portfolio risk

Correlation shows how closely two investments move together. How it lowers a portfolio's risk, where diversification ends and how to measure it. With examples.

Analysis and factors

How to backtest an ETF portfolio: a step-by-step guide

Backtest an ETF portfolio step by step: find securities, set weights, savings plan, rebalancing, costs, taxes and proxies, then read the results. With a worked example.

Portfolio und Strategie

Private Markets messen: J-Kurve, TVPI, PME und Desmoothing

Private Markets richtig messen: J-Kurve, Capital Calls und Ausschüttungen, IRR, TVPI, DPI, PME und Direct Alpha, geglättete NAVs, Desmoothing und Public Proxy mit Hebel.

Portfolio und Strategie

Markowitz-Kritik: Schätzfehler, Rauschen und echte Streuung

Warum optimierte Portfolios enttäuschen, wie viel Rauschen in Korrelationen steckt und wie man die echte Zahl unabhängiger Wetten misst. Mit Beispielen und Belegen.

Portfolio und Strategie

Overlay-Management mit Futures: Beta, Duration, Währung

Overlay-Management erklärt: Beta- und Duration-Overlay mit Kontraktzahl-Formeln, Cash Equitization, Rebalancing über Futures, Währungs-Overlay, Margin, Basisrisiko und Roll.

Ready for your first backtest?

Create an account, confirm your email, get started. No ads and no subscription.

Base currency: Euro, other currencies converted
Taxes: Withholding tax, partial exemption, Vorabpauschale
Data: Prices, interest rates, inflation and factors from public sources
Privacy: Servers in the EU, no ads, statistics without cookies
Devices: Computer and phone, everything saved in your account
Price: Free during the beta