Learn to read your numbers.
Short lessons in four series. Each answers a question you ask yourself when you look at your portfolio. The key points are right here, and each lesson has a short video. Education only, not investment advice.
The glossary explains the terms.
Understanding investing
Ideas every investor needs.
What is a portfolio, and why does the mix matter?
How is my money split, and is that what I meant?
- The allocation ring shows every stock as a slice, cash included.
- What does well quietly grows bigger.
- Before any purchase, a look at the weighting helps.
- The price only shows what the share is worth today.
- Dividends and premiums count too; withholding tax is subtracted.
- A sold position keeps its total income in the list.
- TTWROR measures your decisions, leaving deposits and withdrawals out.
- IRR measures how well the money you put in has worked.
- To compare with an index, you use TTWROR.
- Volatility measures how strongly your portfolio moves.
- A bad month between good ones is normal; the heatmap shows it in context.
- Rendity puts your history next to the DAX, the S&P 500 or any ticker.
- You choose the period yourself.
- Fees and withholding tax are listed per day in Daily P&L.
- Exchange rates change your value even when the share stands still.
Trade options with confidence
Calls and puts, what they pay and what can happen.
Calls and puts in plain words
What is a call, what is a put, and what do I promise when I sell one?
- A call is the right to buy 100 shares at a fixed price, a put the right to sell them.
- Whoever sells the right receives a premium and takes on an obligation in return.
- One contract always stands for 100 shares.
- One contract covers 100 shares you own.
- The premium is yours, whatever happens.
- If the price rises above the strike, the shares go at the strike.
- You promise to buy shares at the strike and receive a premium.
- Strike × 100 per contract stays tied up until then.
- If the price stays below the strike, the call expires worthless.
- If it is exercised, you sell at the strike and realize the gain.
- Every buy, every call and every dividend sits on one line.
- The dash-dot line is your cost basis, in Rendity “Avg cost”.
Reading your numbers in Rendity
What each page shows and how to read it.
A tour of the dashboard
Where do I look first each day?
- First the allocation, then the portfolio value against the capital invested.
- Below that, the options planner with your calls.
- Income counts payments: dividends, interest, premiums, realized gains.
- Performance also counts what happens on paper.
- From the starting value through stock gains, option income, dividends and interest to the end value.
- Every line can be traced back to its transaction.
- The reconciliation checks Rendity against the account statement.
- You see any difference line by line.
- The Positions page lists every stock you hold or held, with its total income.
- Unrealized P&L stands next to it and is never part of it.
- The list shows your display currency, the position page the stock's currency.
- Every amount in or out, with the balance after each line.
- Each currency has its own ledger.
- Dollars stay dollars; the ledger never converts.
- The period at the top decides which days a page shows.
- It applies on every page until you change it.
- If a number looks too small, check the period first.
- Rendity receives your account statement from Interactive Brokers once a day.
- The date at the top shows which day you are looking at.
- You renew the token once a year, and Rendity reminds you beforehand.
Setup, tax and your plan
How you connect your account and what the reports are for.
Connecting Interactive Brokers
How do I connect Rendity to Interactive Brokers?
- Once, 15 to 20 minutes, with one picture per step.
- Rendity only receives your daily account statement, which cannot place orders.
- At the end, Rendity checks that everything is right.
- It is a preliminary basis for working with your tax advisor.
- For accounts with euro as base currency.
- After the first import, Rendity checks everything you have ever traded.
- Your data stays stored, whatever you decide.