Financial Data & Scenario Tools
Small tools for testing assumptions, understanding market data and making financial calculations more transparent.
Global Macro & Rates Lab
Turn a view on growth, inflation and policy into a curve scenario. Explore five markets with official macro APIs, US and euro-area model zero curves, and editable assumptions. Inspect bond pricing, duration, convexity and key-rate DV01. Export the scenario and your research memo.
Explore the lab →💱 Currency Converter
What is this?
Convert currencies using real ECB rates. The mini charts show 30-day trends. Click any card to quick-convert.
₿ Crypto Prices — live
What is this?
Live cryptocurrency prices from CoinGecko. Prices update every time you open the page. Shows the top coins by market cap plus 24-hour change.
📈 Stock Quote — live
What is this?
Look up any US stock price by ticker symbol (like AAPL, TSLA, MSFT). Uses Alpha Vantage free API. The free tier allows 25 lookups per day — plenty for checking prices. Data is delayed ~15 min.
API key
Optional: paste your own Alpha Vantage key for more reliable stock lookups. It is stored only in this browser.
🌍 Inflation by Country — World Bank data
What is this?
Real annual inflation rates (CPI) for major economies, from the World Bank. This is the official data governments report. Updated yearly — the most recent data is typically 1-2 years behind. Useful for comparing inflation across countries over time.
🏢 Company Valuation (DCF)
What is this?
DCF estimates a company's worth by adding up all future cash flows, discounted to today's value. $100 next year is worth less than $100 today — the discount rate captures that.
| Year | FCF ($M) | Discount | PV ($M) |
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🌱 Compound Interest
What is this?
See how money snowballs. Start with something, add monthly, and let time work. Stock market averages ~7-10%/yr historically.
| Year | Put In | Interest | Balance |
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🏠 Loan / Mortgage
What is this?
Calculate monthly payments for any loan. See total interest cost and how extra payments save money.
| Year | Principal | Interest | Remaining |
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📊 Stock Return Calculator
What is this?
Enter buy/sell price and holding period to get your total and annualized return. Annualized lets you fairly compare investments held for different durations.
💸 Inflation Calculator
What is this?
See how inflation erodes purchasing power. Check what today's money will buy in the future, or what old money would be worth now.
| Year | Value | Change |
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