08 · Record

Money you actually hold.

Every figure on this site, readable in a currency you actually hold, converted at the rate its own date carried.

What is that in money you hold?

This industry reports in New Taiwan dollars, won, yen and US dollars. Reading a figure you cannot size is not reading it.

NT$ 250 billion is a number almost nobody can hold in their head. Converting it is easy. Converting it honestly is where most converters quietly cheat, by applying today's rate to a figure published years ago. That produces a number nobody ever had. Everything below converts at the rate the figure's own date carried, and says which date it used.

Why the date matters

One unit of each currency, in euro, indexed to the first covered day. The only claim being made is that the line is not flat.

Value in euro, indexed to 100 at the start of the covered span

2014-01-02 to 2026-08-13 · European Central Bank

Each currency is indexed to its own first covered day because the raw rates differ by four orders of magnitude, and one scale per chart is a house rule. Indexing is arithmetic on published rates and is marked derived.

The three cheats this refuses

Each one is standard practice somewhere on the web.

One. Today's rate on an old figure. A 2019 revenue figure converted at a 2026 rate is not that company's 2019 revenue in euro. The default here is the rate of the figure's own date. A single fixed rate is available as a setting, because holding the currency still is the way to see how much of a movement was the currency, but it is never the default and it is always labelled.

Two. Filling a gap in silence. Reference rates are published on working days. A figure dated on a weekend has no rate of its own. This site will use the last published rate, but it names the date it used, every time, in the tooltip. The substitution is not the cheat. The silence is.

Three. Hiding a cross-rate. The European Central Bank publishes euro reference rates for around thirty currencies, and the New Taiwan dollar is not one of them. No amount of wanting it makes it appear. Every TWD figure here is therefore chained through the US dollar: TWD per EUR = (Taiwan dollars per US dollar) x (USD per EUR). Two publishers, both named on every figure, and the result is marked derived wherever it appears. This build's file carries 34 of the ECB's currencies.

Publisher	What it publishes	Used for	Source
European Central Bank	euro reference rates; 34 of them in this build's file	every conversion, as the base	ECB reference rates
Board of Governors of the Federal Reserve System	Taiwan dollars per US dollar, H.10	the TWD leg of the cross-rate	FRED series DEXTAUS

ECB reference rates are published around 16:00 CET on TARGET working days and are stated by the ECB to be for information only, not for market transactions. Rates are the publisher's own daily figures. Monthly figures are the mean of the published daily rates in that month and are marked derived. No rate is carried forward into a date the publisher did not print, and no rate is interpolated.

A personal project, built in a private capacity from public sources only. Published by YINDOR, the one-person business of Jorg Jansen. Not affiliated with or endorsed by any employer. Not investment advice, and no view is stated on any company or security anywhere on this site. This build is a working prototype. The exchange-rate file covers 2014-01-02 to 2026-08-13 and was last collected 2026-08-14; the vintage file was last collected 2026-08-14. Both dates are read from the files themselves, so a footer that has gone stale says so rather than repeating what was true at the time it was written.